Finding the Fourth Proportional to 21,738.55, 32,585.76 and 12,359.18

Step by Step Solution

1. Step 1: Write the proportion equation
   21,738.55 : 32,585.76 = 12,359.18 : x
2. Step 2: Convert to fraction form
   21,738.55/32,585.76 = 12,359.18/x
3. Step 3: Cross multiply
   21,738.55x = 32,585.76 × 12,359.18
4. Step 4: Simplify right side
   21,738.55x = 402,733,273.28
5. Step 5: Solve for x
   x = 402,733,273.28/21,738.55
6. Step 6: Final answer
   x = 18,526.23