Finding the Fourth Proportional to 21,666.78, 32,473.58 and 12,314.61

Step by Step Solution

1. Step 1: Write the proportion equation
   21,666.78 : 32,473.58 = 12,314.61 : x
2. Step 2: Convert to fraction form
   21,666.78/32,473.58 = 12,314.61/x
3. Step 3: Cross multiply
   21,666.78x = 32,473.58 × 12,314.61
4. Step 4: Simplify right side
   21,666.78x = 399,899,411.43
5. Step 5: Solve for x
   x = 399,899,411.43/21,666.78
6. Step 6: Final answer
   x = 18,456.80