Finding the Fourth Proportional to 12,708.90, 19,085.22 and 12,162.15

Step by Step Solution

1. Step 1: Write the proportion equation
   12,708.90 : 19,085.22 = 12,162.15 : x
2. Step 2: Convert to fraction form
   12,708.90/19,085.22 = 12,162.15/x
3. Step 3: Cross multiply
   12,708.90x = 19,085.22 × 12,162.15
4. Step 4: Simplify right side
   12,708.90x = 232,117,308.42
5. Step 5: Solve for x
   x = 232,117,308.42/12,708.90
6. Step 6: Final answer
   x = 18,264.15