Finding the Fourth Proportional to 12,851.48, 17,734.68 and 7,815.83

Step by Step Solution

1. Step 1: Write the proportion equation
   12,851.48 : 17,734.68 = 7,815.83 : x
2. Step 2: Convert to fraction form
   12,851.48/17,734.68 = 7,815.83/x
3. Step 3: Cross multiply
   12,851.48x = 17,734.68 × 7,815.83
4. Step 4: Simplify right side
   12,851.48x = 138,611,243.98
5. Step 5: Solve for x
   x = 138,611,243.98/12,851.48
6. Step 6: Final answer
   x = 10,785.63