Finding the Fourth Proportional to 52,851.17, 72,934.58 and 28,978.25

Step by Step Solution

1. Step 1: Write the proportion equation
   52,851.17 : 72,934.58 = 28,978.25 : x
2. Step 2: Convert to fraction form
   52,851.17/72,934.58 = 28,978.25/x
3. Step 3: Cross multiply
   52,851.17x = 72,934.58 × 28,978.25
4. Step 4: Simplify right side
   52,851.17x = 2,113,515,983.32
5. Step 5: Solve for x
   x = 2,113,515,983.32/52,851.17
6. Step 6: Final answer
   x = 39,989.96