Finding the Fourth Proportional to 21,784.95, 32,689.86 and 18,131.43

Step by Step Solution

1. Step 1: Write the proportion equation
   21,784.95 : 32,689.86 = 18,131.43 : x
2. Step 2: Convert to fraction form
   21,784.95/32,689.86 = 18,131.43/x
3. Step 3: Cross multiply
   21,784.95x = 32,689.86 × 18,131.43
4. Step 4: Simplify right side
   21,784.95x = 592,713,908.30
5. Step 5: Solve for x
   x = 592,713,908.30/21,784.95
6. Step 6: Final answer
   x = 27,207.49