Finding the Fourth Proportional to 12,866.31, 17,755.61 and 7,277.31

Step by Step Solution

1. Step 1: Write the proportion equation
   12,866.31 : 17,755.61 = 7,277.31 : x
2. Step 2: Convert to fraction form
   12,866.31/17,755.61 = 7,277.31/x
3. Step 3: Cross multiply
   12,866.31x = 17,755.61 × 7,277.31
4. Step 4: Simplify right side
   12,866.31x = 129,213,041.82
5. Step 5: Solve for x
   x = 129,213,041.82/12,866.31
6. Step 6: Final answer
   x = 10,042.74