Finding the Fourth Proportional to 9,326.04, 12,871.10 and 5,789.78

Step by Step Solution

1. Step 1: Write the proportion equation
   9,326.04 : 12,871.10 = 5,789.78 : x
2. Step 2: Convert to fraction form
   9,326.04/12,871.10 = 5,789.78/x
3. Step 3: Cross multiply
   9,326.04x = 12,871.10 × 5,789.78
4. Step 4: Simplify right side
   9,326.04x = 74,520,835.74
5. Step 5: Solve for x
   x = 74,520,835.74/9,326.04
6. Step 6: Final answer
   x = 7,990.62