Finding the Fourth Proportional to 12,152.59, 16,765.64 and 7,439.60

Step by Step Solution

1. Step 1: Write the proportion equation
   12,152.59 : 16,765.64 = 7,439.60 : x
2. Step 2: Convert to fraction form
   12,152.59/16,765.64 = 7,439.60/x
3. Step 3: Cross multiply
   12,152.59x = 16,765.64 × 7,439.60
4. Step 4: Simplify right side
   12,152.59x = 124,729,687.96
5. Step 5: Solve for x
   x = 124,729,687.96/12,152.59
6. Step 6: Final answer
   x = 10,263.63