Finding the Fourth Proportional to 2,165,139,591.12, 2,987,893,878.75 and 1,175,065,008.12

Step by Step Solution

1. Step 1: Write the proportion equation
   2,165,139,591.12 : 2,987,893,878.75 = 1,175,065,008.12 : x
2. Step 2: Convert to fraction form
   2,165,139,591.12/2,987,893,878.75 = 1,175,065,008.12/x
3. Step 3: Cross multiply
   2,165,139,591.12x = 2,987,893,878.75 × 1,175,065,008.12
4. Step 4: Simplify right side
   2,165,139,591.12x = 3,510,969,544,895,066,624
5. Step 5: Solve for x
   x = 3,510,969,544,895,066,624/2,165,139,591.12
6. Step 6: Final answer
   x = 1,621,590,385.81