Finding the Fourth Proportional to 72,562.28, 108,801.36 and 28,137.02

Step by Step Solution

1. Step 1: Write the proportion equation
   72,562.28 : 108,801.36 = 28,137.02 : x
2. Step 2: Convert to fraction form
   72,562.28/108,801.36 = 28,137.02/x
3. Step 3: Cross multiply
   72,562.28x = 108,801.36 × 28,137.02
4. Step 4: Simplify right side
   72,562.28x = 3,061,345,498.34
5. Step 5: Solve for x
   x = 3,061,345,498.34/72,562.28
6. Step 6: Final answer
   x = 42,189.22