Finding the Fourth Proportional to 12,647.61, 17,453.75 and 7,342.65

Step by Step Solution

1. Step 1: Write the proportion equation
   12,647.61 : 17,453.75 = 7,342.65 : x
2. Step 2: Convert to fraction form
   12,647.61/17,453.75 = 7,342.65/x
3. Step 3: Cross multiply
   12,647.61x = 17,453.75 × 7,342.65
4. Step 4: Simplify right side
   12,647.61x = 128,156,740.72
5. Step 5: Solve for x
   x = 128,156,740.72/12,647.61
6. Step 6: Final answer
   x = 10,132.88