Finding the Fourth Proportional to 1,388,367.74, 1,915,951.98 and 776,531.00

Step by Step Solution

1. Step 1: Write the proportion equation
   1,388,367.74 : 1,915,951.98 = 776,531.00 : x
2. Step 2: Convert to fraction form
   1,388,367.74/1,915,951.98 = 776,531.00/x
3. Step 3: Cross multiply
   1,388,367.74x = 1,915,951.98 × 776,531.00
4. Step 4: Simplify right side
   1,388,367.74x = 1,487,796,097,401.62
5. Step 5: Solve for x
   x = 1,487,796,097,401.62/1,388,367.74
6. Step 6: Final answer
   x = 1,071,615.29