Finding the Fourth Proportional to 72,602.22, 108,931.50 and 28,260.12

Step by Step Solution

1. Step 1: Write the proportion equation
   72,602.22 : 108,931.50 = 28,260.12 : x
2. Step 2: Convert to fraction form
   72,602.22/108,931.50 = 28,260.12/x
3. Step 3: Cross multiply
   72,602.22x = 108,931.50 × 28,260.12
4. Step 4: Simplify right side
   72,602.22x = 3,078,417,261.78
5. Step 5: Solve for x
   x = 3,078,417,261.78/72,602.22
6. Step 6: Final answer
   x = 42,401.15