Finding the Fourth Proportional to 948,085.98, 1,308,349.71 and 518,361.54

Step by Step Solution

1. Step 1: Write the proportion equation
   948,085.98 : 1,308,349.71 = 518,361.54 : x
2. Step 2: Convert to fraction form
   948,085.98/1,308,349.71 = 518,361.54/x
3. Step 3: Cross multiply
   948,085.98x = 1,308,349.71 × 518,361.54
4. Step 4: Simplify right side
   948,085.98x = 678,198,170,534.15
5. Step 5: Solve for x
   x = 678,198,170,534.15/948,085.98
6. Step 6: Final answer
   x = 715,334.04