Finding the Fourth Proportional to 12,061.36, 18,068.49 and 8,312.47

Step by Step Solution

1. Step 1: Write the proportion equation
   12,061.36 : 18,068.49 = 8,312.47 : x
2. Step 2: Convert to fraction form
   12,061.36/18,068.49 = 8,312.47/x
3. Step 3: Cross multiply
   12,061.36x = 18,068.49 × 8,312.47
4. Step 4: Simplify right side
   12,061.36x = 150,193,781.07
5. Step 5: Solve for x
   x = 150,193,781.07/12,061.36
6. Step 6: Final answer
   x = 12,452.47