Finding the Fourth Proportional to 42,417.71, 63,635.71 and 12,434.40

Step by Step Solution

1. Step 1: Write the proportion equation
   42,417.71 : 63,635.71 = 12,434.40 : x
2. Step 2: Convert to fraction form
   42,417.71/63,635.71 = 12,434.40/x
3. Step 3: Cross multiply
   42,417.71x = 63,635.71 × 12,434.40
4. Step 4: Simplify right side
   42,417.71x = 791,271,872.42
5. Step 5: Solve for x
   x = 791,271,872.42/42,417.71
6. Step 6: Final answer
   x = 18,654.28