Finding the Fourth Proportional to 12,959.92, 17,878.53 and 7,651.18

Step by Step Solution

1. Step 1: Write the proportion equation
   12,959.92 : 17,878.53 = 7,651.18 : x
2. Step 2: Convert to fraction form
   12,959.92/17,878.53 = 7,651.18/x
3. Step 3: Cross multiply
   12,959.92x = 17,878.53 × 7,651.18
4. Step 4: Simplify right side
   12,959.92x = 136,791,851.17
5. Step 5: Solve for x
   x = 136,791,851.17/12,959.92
6. Step 6: Final answer
   x = 10,554.99