Finding the Fourth Proportional to 21,863.55, 30,166.52 and 12,437.31

Step by Step Solution

1. Step 1: Write the proportion equation
   21,863.55 : 30,166.52 = 12,437.31 : x
2. Step 2: Convert to fraction form
   21,863.55/30,166.52 = 12,437.31/x
3. Step 3: Cross multiply
   21,863.55x = 30,166.52 × 12,437.31
4. Step 4: Simplify right side
   21,863.55x = 375,190,298.67
5. Step 5: Solve for x
   x = 375,190,298.67/21,863.55
6. Step 6: Final answer
   x = 17,160.54