Finding the Fourth Proportional to 1,144,155.69, 1,578,830.46 and 678,929.40

Step by Step Solution

1. Step 1: Write the proportion equation
   1,144,155.69 : 1,578,830.46 = 678,929.40 : x
2. Step 2: Convert to fraction form
   1,144,155.69/1,578,830.46 = 678,929.40/x
3. Step 3: Cross multiply
   1,144,155.69x = 1,578,830.46 × 678,929.40
4. Step 4: Simplify right side
   1,144,155.69x = 1,071,914,416,909.52
5. Step 5: Solve for x
   x = 1,071,914,416,909.52/1,144,155.69
6. Step 6: Final answer
   x = 936,860.63