Finding the Fourth Proportional to 9,976.80, 13,767.39 and 5,500.74

Step by Step Solution

1. Step 1: Write the proportion equation
   9,976.80 : 13,767.39 = 5,500.74 : x
2. Step 2: Convert to fraction form
   9,976.80/13,767.39 = 5,500.74/x
3. Step 3: Cross multiply
   9,976.80x = 13,767.39 × 5,500.74
4. Step 4: Simplify right side
   9,976.80x = 75,730,832.87
5. Step 5: Solve for x
   x = 75,730,832.87/9,976.80
6. Step 6: Final answer
   x = 7,590.69