Finding the Fourth Proportional to 12,807.71, 17,676.08 and 7,773.15

Step by Step Solution

1. Step 1: Write the proportion equation
   12,807.71 : 17,676.08 = 7,773.15 : x
2. Step 2: Convert to fraction form
   12,807.71/17,676.08 = 7,773.15/x
3. Step 3: Cross multiply
   12,807.71x = 17,676.08 × 7,773.15
4. Step 4: Simplify right side
   12,807.71x = 137,398,782.39
5. Step 5: Solve for x
   x = 137,398,782.39/12,807.71
6. Step 6: Final answer
   x = 10,727.82