Finding the Fourth Proportional to 21,445.02, 29,593.67 and 13,500.72

Step by Step Solution

1. Step 1: Write the proportion equation
   21,445.02 : 29,593.67 = 13,500.72 : x
2. Step 2: Convert to fraction form
   21,445.02/29,593.67 = 13,500.72/x
3. Step 3: Cross multiply
   21,445.02x = 29,593.67 × 13,500.72
4. Step 4: Simplify right side
   21,445.02x = 399,535,784.94
5. Step 5: Solve for x
   x = 399,535,784.94/21,445.02
6. Step 6: Final answer
   x = 18,630.70