Finding the Fourth Proportional to 8,921.17, 12,300.03 and 5,728.83

Step by Step Solution

1. Step 1: Write the proportion equation
   8,921.17 : 12,300.03 = 5,728.83 : x
2. Step 2: Convert to fraction form
   8,921.17/12,300.03 = 5,728.83/x
3. Step 3: Cross multiply
   8,921.17x = 12,300.03 × 5,728.83
4. Step 4: Simplify right side
   8,921.17x = 70,464,780.86
5. Step 5: Solve for x
   x = 70,464,780.86/8,921.17
6. Step 6: Final answer
   x = 7,898.60