Finding the Fourth Proportional to 1,317,880.86, 1,976,071.89 and 518,729.10

Step by Step Solution

1. Step 1: Write the proportion equation
   1,317,880.86 : 1,976,071.89 = 518,729.10 : x
2. Step 2: Convert to fraction form
   1,317,880.86/1,976,071.89 = 518,729.10/x
3. Step 3: Cross multiply
   1,317,880.86x = 1,976,071.89 × 518,729.10
4. Step 4: Simplify right side
   1,317,880.86x = 1,025,045,993,035.00
5. Step 5: Solve for x
   x = 1,025,045,993,035.00/1,317,880.86
6. Step 6: Final answer
   x = 777,798.68