Finding the Fourth Proportional to 12,807.81, 17,675.94 and 7,773.32

Step by Step Solution

1. Step 1: Write the proportion equation
   12,807.81 : 17,675.94 = 7,773.32 : x
2. Step 2: Convert to fraction form
   12,807.81/17,675.94 = 7,773.32/x
3. Step 3: Cross multiply
   12,807.81x = 17,675.94 × 7,773.32
4. Step 4: Simplify right side
   12,807.81x = 137,400,649.54
5. Step 5: Solve for x
   x = 137,400,649.54/12,807.81
6. Step 6: Final answer
   x = 10,727.88