Finding the Fourth Proportional to 12,633.75, 18,957.45 and 5,243.31

Step by Step Solution

1. Step 1: Write the proportion equation
   12,633.75 : 18,957.45 = 5,243.31 : x
2. Step 2: Convert to fraction form
   12,633.75/18,957.45 = 5,243.31/x
3. Step 3: Cross multiply
   12,633.75x = 18,957.45 × 5,243.31
4. Step 4: Simplify right side
   12,633.75x = 99,399,787.16
5. Step 5: Solve for x
   x = 99,399,787.16/12,633.75
6. Step 6: Final answer
   x = 7,867.80