Finding the Fourth Proportional to 12,370.72, 17,061.96 and 7,657.60

Step by Step Solution

1. Step 1: Write the proportion equation
   12,370.72 : 17,061.96 = 7,657.60 : x
2. Step 2: Convert to fraction form
   12,370.72/17,061.96 = 7,657.60/x
3. Step 3: Cross multiply
   12,370.72x = 17,061.96 × 7,657.60
4. Step 4: Simplify right side
   12,370.72x = 130,653,664.90
5. Step 5: Solve for x
   x = 130,653,664.90/12,370.72
6. Step 6: Final answer
   x = 10,561.52