Finding the Fourth Proportional to 948,443.40, 1,308,877.80 and 518,748.96

Step by Step Solution

1. Step 1: Write the proportion equation
   948,443.40 : 1,308,877.80 = 518,748.96 : x
2. Step 2: Convert to fraction form
   948,443.40/1,308,877.80 = 518,748.96/x
3. Step 3: Cross multiply
   948,443.40x = 1,308,877.80 × 518,748.96
4. Step 4: Simplify right side
   948,443.40x = 678,978,997,517.09
5. Step 5: Solve for x
   x = 678,978,997,517.09/948,443.40
6. Step 6: Final answer
   x = 715,887.74