Finding the Fourth Proportional to 8,730.77, 12,048.69 and 5,375.55

Step by Step Solution

1. Step 1: Write the proportion equation
   8,730.77 : 12,048.69 = 5,375.55 : x
2. Step 2: Convert to fraction form
   8,730.77/12,048.69 = 5,375.55/x
3. Step 3: Cross multiply
   8,730.77x = 12,048.69 × 5,375.55
4. Step 4: Simplify right side
   8,730.77x = 64,768,335.53
5. Step 5: Solve for x
   x = 64,768,335.53/8,730.77
6. Step 6: Final answer
   x = 7,418.40