Finding the Fourth Proportional to 153,405,064.35, 211,697,591.31 and 83,790,426.78

Step by Step Solution

1. Step 1: Write the proportion equation
   153,405,064.35 : 211,697,591.31 = 83,790,426.78 : x
2. Step 2: Convert to fraction form
   153,405,064.35/211,697,591.31 = 83,790,426.78/x
3. Step 3: Cross multiply
   153,405,064.35x = 211,697,591.31 × 83,790,426.78
4. Step 4: Simplify right side
   153,405,064.35x = 17,738,231,524,162,920
5. Step 5: Solve for x
   x = 17,738,231,524,162,920/153,405,064.35
6. Step 6: Final answer
   x = 115,630,025.64