Finding the Fourth Proportional to 42,942.20, 64,419.15 and 14,854.72

Step by Step Solution

1. Step 1: Write the proportion equation
   42,942.20 : 64,419.15 = 14,854.72 : x
2. Step 2: Convert to fraction form
   42,942.20/64,419.15 = 14,854.72/x
3. Step 3: Cross multiply
   42,942.20x = 64,419.15 × 14,854.72
4. Step 4: Simplify right side
   42,942.20x = 956,928,435.89
5. Step 5: Solve for x
   x = 956,928,435.89/42,942.20
6. Step 6: Final answer
   x = 22,284.10