Finding the Fourth Proportional to 72,679.02, 109,061.46 and 39,398.28

Step by Step Solution

1. Step 1: Write the proportion equation
   72,679.02 : 109,061.46 = 39,398.28 : x
2. Step 2: Convert to fraction form
   72,679.02/109,061.46 = 39,398.28/x
3. Step 3: Cross multiply
   72,679.02x = 109,061.46 × 39,398.28
4. Step 4: Simplify right side
   72,679.02x = 4,296,833,938.29
5. Step 5: Solve for x
   x = 4,296,833,938.29/72,679.02
6. Step 6: Final answer
   x = 59,120.69