Finding the Fourth Proportional to 21,660.32, 32,490.42 and 17,723.72

Step by Step Solution

1. Step 1: Write the proportion equation
   21,660.32 : 32,490.42 = 17,723.72 : x
2. Step 2: Convert to fraction form
   21,660.32/32,490.42 = 17,723.72/x
3. Step 3: Cross multiply
   21,660.32x = 32,490.42 × 17,723.72
4. Step 4: Simplify right side
   21,660.32x = 575,851,106.76
5. Step 5: Solve for x
   x = 575,851,106.76/21,660.32
6. Step 6: Final answer
   x = 26,585.53