Finding the Fourth Proportional to 21,127.31, 29,150.76 and 14,426.89

Step by Step Solution

1. Step 1: Write the proportion equation
   21,127.31 : 29,150.76 = 14,426.89 : x
2. Step 2: Convert to fraction form
   21,127.31/29,150.76 = 14,426.89/x
3. Step 3: Cross multiply
   21,127.31x = 29,150.76 × 14,426.89
4. Step 4: Simplify right side
   21,127.31x = 420,554,807.94
5. Step 5: Solve for x
   x = 420,554,807.94/21,127.31
6. Step 6: Final answer
   x = 19,905.74