Finding the Fourth Proportional to 42,399.99, 63,606.90 and 14,321.72

Step by Step Solution

1. Step 1: Write the proportion equation
   42,399.99 : 63,606.90 = 14,321.72 : x
2. Step 2: Convert to fraction form
   42,399.99/63,606.90 = 14,321.72/x
3. Step 3: Cross multiply
   42,399.99x = 63,606.90 × 14,321.72
4. Step 4: Simplify right side
   42,399.99x = 910,960,124.86
5. Step 5: Solve for x
   x = 910,960,124.86/42,399.99
6. Step 6: Final answer
   x = 21,484.91