Finding the Fourth Proportional to 12,854.34, 19,164.42 and 12,531.15

Step by Step Solution

1. Step 1: Write the proportion equation
   12,854.34 : 19,164.42 = 12,531.15 : x
2. Step 2: Convert to fraction form
   12,854.34/19,164.42 = 12,531.15/x
3. Step 3: Cross multiply
   12,854.34x = 19,164.42 × 12,531.15
4. Step 4: Simplify right side
   12,854.34x = 240,152,159.03
5. Step 5: Solve for x
   x = 240,152,159.03/12,854.34
6. Step 6: Final answer
   x = 18,682.57