Finding the Fourth Proportional to 21,372.72, 32,015.54 and 17,438

Step by Step Solution

1. Step 1: Write the proportion equation
   21,372.72 : 32,015.54 = 17,438 : x
2. Step 2: Convert to fraction form
   21,372.72/32,015.54 = 17,438/x
3. Step 3: Cross multiply
   21,372.72x = 32,015.54 × 17,438
4. Step 4: Simplify right side
   21,372.72x = 558,286,986.52
5. Step 5: Solve for x
   x = 558,286,986.52/21,372.72
6. Step 6: Final answer
   x = 26,121.48