Finding the Fourth Proportional to 1,440,435,168.26, 1,987,774,620.72 and 813,890,144.10

Step by Step Solution

1. Step 1: Write the proportion equation
   1,440,435,168.26 : 1,987,774,620.72 = 813,890,144.10 : x
2. Step 2: Convert to fraction form
   1,440,435,168.26/1,987,774,620.72 = 813,890,144.10/x
3. Step 3: Cross multiply
   1,440,435,168.26x = 1,987,774,620.72 × 813,890,144.10
4. Step 4: Simplify right side
   1,440,435,168.26x = 1,617,830,172,496,123,648
5. Step 5: Solve for x
   x = 1,617,830,172,496,123,648/1,440,435,168.26
6. Step 6: Final answer
   x = 1,123,153,758.08