Finding the Fourth Proportional to 272,002.56, 408,061.44 and 85,028.16

Step by Step Solution

1. Step 1: Write the proportion equation
   272,002.56 : 408,061.44 = 85,028.16 : x
2. Step 2: Convert to fraction form
   272,002.56/408,061.44 = 85,028.16/x
3. Step 3: Cross multiply
   272,002.56x = 408,061.44 × 85,028.16
4. Step 4: Simplify right side
   272,002.56x = 34,696,713,410.15
5. Step 5: Solve for x
   x = 34,696,713,410.15/272,002.56
6. Step 6: Final answer
   x = 127,560.25