Finding the Fourth Proportional to 12,740.40, 17,581.52 and 7,074.86

Step by Step Solution

1. Step 1: Write the proportion equation
   12,740.40 : 17,581.52 = 7,074.86 : x
2. Step 2: Convert to fraction form
   12,740.40/17,581.52 = 7,074.86/x
3. Step 3: Cross multiply
   12,740.40x = 17,581.52 × 7,074.86
4. Step 4: Simplify right side
   12,740.40x = 124,386,722.37
5. Step 5: Solve for x
   x = 124,386,722.37/12,740.40
6. Step 6: Final answer
   x = 9,763.17