Finding the Fourth Proportional to 12,565.46, 18,826.40 and 7,624.72

Step by Step Solution

1. Step 1: Write the proportion equation
   12,565.46 : 18,826.40 = 7,624.72 : x
2. Step 2: Convert to fraction form
   12,565.46/18,826.40 = 7,624.72/x
3. Step 3: Cross multiply
   12,565.46x = 18,826.40 × 7,624.72
4. Step 4: Simplify right side
   12,565.46x = 143,546,028.61
5. Step 5: Solve for x
   x = 143,546,028.61/12,565.46
6. Step 6: Final answer
   x = 11,423.86