Finding the Fourth Proportional to 21,403.72, 32,105.60 and 7,543

Step by Step Solution

1. Step 1: Write the proportion equation
   21,403.72 : 32,105.60 = 7,543 : x
2. Step 2: Convert to fraction form
   21,403.72/32,105.60 = 7,543/x
3. Step 3: Cross multiply
   21,403.72x = 32,105.60 × 7,543
4. Step 4: Simplify right side
   21,403.72x = 242,172,540.80
5. Step 5: Solve for x
   x = 242,172,540.80/21,403.72
6. Step 6: Final answer
   x = 11,314.51