Finding the Fourth Proportional to 42,686.40, 64,025.76 and 14,982.72

Step by Step Solution

1. Step 1: Write the proportion equation
   42,686.40 : 64,025.76 = 14,982.72 : x
2. Step 2: Convert to fraction form
   42,686.40/64,025.76 = 14,982.72/x
3. Step 3: Cross multiply
   42,686.40x = 64,025.76 × 14,982.72
4. Step 4: Simplify right side
   42,686.40x = 959,280,034.87
5. Step 5: Solve for x
   x = 959,280,034.87/42,686.40
6. Step 6: Final answer
   x = 22,472.73