Finding the Fourth Proportional to 8,780.18, 12,115.24 and 5,003.42

Step by Step Solution

1. Step 1: Write the proportion equation
   8,780.18 : 12,115.24 = 5,003.42 : x
2. Step 2: Convert to fraction form
   8,780.18/12,115.24 = 5,003.42/x
3. Step 3: Cross multiply
   8,780.18x = 12,115.24 × 5,003.42
4. Step 4: Simplify right side
   8,780.18x = 60,617,634.12
5. Step 5: Solve for x
   x = 60,617,634.12/8,780.18
6. Step 6: Final answer
   x = 6,903.92