Finding the Fourth Proportional to 8,698.77, 12,003.12 and 5,159.88

Step by Step Solution

1. Step 1: Write the proportion equation
   8,698.77 : 12,003.12 = 5,159.88 : x
2. Step 2: Convert to fraction form
   8,698.77/12,003.12 = 5,159.88/x
3. Step 3: Cross multiply
   8,698.77x = 12,003.12 × 5,159.88
4. Step 4: Simplify right side
   8,698.77x = 61,934,658.83
5. Step 5: Solve for x
   x = 61,934,658.83/8,698.77
6. Step 6: Final answer
   x = 7,119.93