Finding the Fourth Proportional to 21,150.18, 29,120.76 and 17,956.80

Step by Step Solution

1. Step 1: Write the proportion equation
   21,150.18 : 29,120.76 = 17,956.80 : x
2. Step 2: Convert to fraction form
   21,150.18/29,120.76 = 17,956.80/x
3. Step 3: Cross multiply
   21,150.18x = 29,120.76 × 17,956.80
4. Step 4: Simplify right side
   21,150.18x = 522,915,663.17
5. Step 5: Solve for x
   x = 522,915,663.17/21,150.18
6. Step 6: Final answer
   x = 24,723.93