Finding the Fourth Proportional to 21,141, 29,174.58 and 12,757.50

Step by Step Solution

1. Step 1: Write the proportion equation
   21,141 : 29,174.58 = 12,757.50 : x
2. Step 2: Convert to fraction form
   21,141/29,174.58 = 12,757.50/x
3. Step 3: Cross multiply
   21,141x = 29,174.58 × 12,757.50
4. Step 4: Simplify right side
   21,141x = 372,194,704.35
5. Step 5: Solve for x
   x = 372,194,704.35/21,141
6. Step 6: Final answer
   x = 17,605.35