Finding the Fourth Proportional to 12,435.59, 18,680.76 and 7,508.16

Step by Step Solution

1. Step 1: Write the proportion equation
   12,435.59 : 18,680.76 = 7,508.16 : x
2. Step 2: Convert to fraction form
   12,435.59/18,680.76 = 7,508.16/x
3. Step 3: Cross multiply
   12,435.59x = 18,680.76 × 7,508.16
4. Step 4: Simplify right side
   12,435.59x = 140,258,135.00
5. Step 5: Solve for x
   x = 140,258,135.00/12,435.59
6. Step 6: Final answer
   x = 11,278.77