Finding the Fourth Proportional to 12,657.39, 17,460.27 and 7,618.57

Step by Step Solution

1. Step 1: Write the proportion equation
   12,657.39 : 17,460.27 = 7,618.57 : x
2. Step 2: Convert to fraction form
   12,657.39/17,460.27 = 7,618.57/x
3. Step 3: Cross multiply
   12,657.39x = 17,460.27 × 7,618.57
4. Step 4: Simplify right side
   12,657.39x = 133,022,289.21
5. Step 5: Solve for x
   x = 133,022,289.21/12,657.39
6. Step 6: Final answer
   x = 10,509.46