Finding the Fourth Proportional to 948,086.98, 1,308,351.09 and 518,362.54

Step by Step Solution

1. Step 1: Write the proportion equation
   948,086.98 : 1,308,351.09 = 518,362.54 : x
2. Step 2: Convert to fraction form
   948,086.98/1,308,351.09 = 518,362.54/x
3. Step 3: Cross multiply
   948,086.98x = 1,308,351.09 × 518,362.54
4. Step 4: Simplify right side
   948,086.98x = 678,200,194,224.17
5. Step 5: Solve for x
   x = 678,200,194,224.17/948,086.98
6. Step 6: Final answer
   x = 715,335.42