Finding the Fourth Proportional to 8,905.16, 12,280.02 and 5,921.48

Step by Step Solution

1. Step 1: Write the proportion equation
   8,905.16 : 12,280.02 = 5,921.48 : x
2. Step 2: Convert to fraction form
   8,905.16/12,280.02 = 5,921.48/x
3. Step 3: Cross multiply
   8,905.16x = 12,280.02 × 5,921.48
4. Step 4: Simplify right side
   8,905.16x = 72,715,892.83
5. Step 5: Solve for x
   x = 72,715,892.83/8,905.16
6. Step 6: Final answer
   x = 8,165.59