Finding the Fourth Proportional to 72,429, 108,580.71 and 28,025.20

Step by Step Solution

1. Step 1: Write the proportion equation
   72,429 : 108,580.71 = 28,025.20 : x
2. Step 2: Convert to fraction form
   72,429/108,580.71 = 28,025.20/x
3. Step 3: Cross multiply
   72,429x = 108,580.71 × 28,025.20
4. Step 4: Simplify right side
   72,429x = 3,042,996,113.89
5. Step 5: Solve for x
   x = 3,042,996,113.89/72,429
6. Step 6: Final answer
   x = 42,013.50