Finding the Fourth Proportional to 21,142.23, 29,109.89 and 17,948.91

Step by Step Solution

1. Step 1: Write the proportion equation
   21,142.23 : 29,109.89 = 17,948.91 : x
2. Step 2: Convert to fraction form
   21,142.23/29,109.89 = 17,948.91/x
3. Step 3: Cross multiply
   21,142.23x = 29,109.89 × 17,948.91
4. Step 4: Simplify right side
   21,142.23x = 522,490,705.98
5. Step 5: Solve for x
   x = 522,490,705.98/21,142.23
6. Step 6: Final answer
   x = 24,713.13