Finding the Fourth Proportional to 12,731.32, 17,570.28 and 7,066.60

Step by Step Solution

1. Step 1: Write the proportion equation
   12,731.32 : 17,570.28 = 7,066.60 : x
2. Step 2: Convert to fraction form
   12,731.32/17,570.28 = 7,066.60/x
3. Step 3: Cross multiply
   12,731.32x = 17,570.28 × 7,066.60
4. Step 4: Simplify right side
   12,731.32x = 124,162,140.65
5. Step 5: Solve for x
   x = 124,162,140.65/12,731.32
6. Step 6: Final answer
   x = 9,752.50