Finding the Fourth Proportional to 8,780.55, 12,118.32 and 5,005.08

Step by Step Solution

1. Step 1: Write the proportion equation
   8,780.55 : 12,118.32 = 5,005.08 : x
2. Step 2: Convert to fraction form
   8,780.55/12,118.32 = 5,005.08/x
3. Step 3: Cross multiply
   8,780.55x = 12,118.32 × 5,005.08
4. Step 4: Simplify right side
   8,780.55x = 60,653,161.07
5. Step 5: Solve for x
   x = 60,653,161.07/8,780.55
6. Step 6: Final answer
   x = 6,907.67