Finding the Fourth Proportional to 12,565.56, 18,818.40 and 7,005.12

Step by Step Solution

1. Step 1: Write the proportion equation
   12,565.56 : 18,818.40 = 7,005.12 : x
2. Step 2: Convert to fraction form
   12,565.56/18,818.40 = 7,005.12/x
3. Step 3: Cross multiply
   12,565.56x = 18,818.40 × 7,005.12
4. Step 4: Simplify right side
   12,565.56x = 131,825,150.21
5. Step 5: Solve for x
   x = 131,825,150.21/12,565.56
6. Step 6: Final answer
   x = 10,490.99