Finding the Fourth Proportional to 12,064.58, 16,626.57 and 9,407.78

Step by Step Solution

1. Step 1: Write the proportion equation
   12,064.58 : 16,626.57 = 9,407.78 : x
2. Step 2: Convert to fraction form
   12,064.58/16,626.57 = 9,407.78/x
3. Step 3: Cross multiply
   12,064.58x = 16,626.57 × 9,407.78
4. Step 4: Simplify right side
   12,064.58x = 156,419,112.71
5. Step 5: Solve for x
   x = 156,419,112.71/12,064.58
6. Step 6: Final answer
   x = 12,965.15