Finding the Fourth Proportional to 12,787.50, 17,647.02 and 7,198.50

Step by Step Solution

1. Step 1: Write the proportion equation
   12,787.50 : 17,647.02 = 7,198.50 : x
2. Step 2: Convert to fraction form
   12,787.50/17,647.02 = 7,198.50/x
3. Step 3: Cross multiply
   12,787.50x = 17,647.02 × 7,198.50
4. Step 4: Simplify right side
   12,787.50x = 127,032,073.47
5. Step 5: Solve for x
   x = 127,032,073.47/12,787.50
6. Step 6: Final answer
   x = 9,934.08