Finding the Fourth Proportional to 12,826.49, 17,699.38 and 7,520.31

Step by Step Solution

1. Step 1: Write the proportion equation
   12,826.49 : 17,699.38 = 7,520.31 : x
2. Step 2: Convert to fraction form
   12,826.49/17,699.38 = 7,520.31/x
3. Step 3: Cross multiply
   12,826.49x = 17,699.38 × 7,520.31
4. Step 4: Simplify right side
   12,826.49x = 133,104,805.61
5. Step 5: Solve for x
   x = 133,104,805.61/12,826.49
6. Step 6: Final answer
   x = 10,377.34