Finding the Fourth Proportional to 72,607.31, 108,868.68 and 28,182.17

Step by Step Solution

1. Step 1: Write the proportion equation
   72,607.31 : 108,868.68 = 28,182.17 : x
2. Step 2: Convert to fraction form
   72,607.31/108,868.68 = 28,182.17/x
3. Step 3: Cross multiply
   72,607.31x = 108,868.68 × 28,182.17
4. Step 4: Simplify right side
   72,607.31x = 3,068,155,233.39
5. Step 5: Solve for x
   x = 3,068,155,233.39/72,607.31
6. Step 6: Final answer
   x = 42,256.84