Finding the Fourth Proportional to 72,630.46, 108,989.43 and 28,278.10

Step by Step Solution

1. Step 1: Write the proportion equation
   72,630.46 : 108,989.43 = 28,278.10 : x
2. Step 2: Convert to fraction form
   72,630.46/108,989.43 = 28,278.10/x
3. Step 3: Cross multiply
   72,630.46x = 108,989.43 × 28,278.10
4. Step 4: Simplify right side
   72,630.46x = 3,082,014,000.48
5. Step 5: Solve for x
   x = 3,082,014,000.48/72,630.46
6. Step 6: Final answer
   x = 42,434.18