Finding the Fourth Proportional to 9,321.02, 12,863.37 and 5,342.90

Step by Step Solution

1. Step 1: Write the proportion equation
   9,321.02 : 12,863.37 = 5,342.90 : x
2. Step 2: Convert to fraction form
   9,321.02/12,863.37 = 5,342.90/x
3. Step 3: Cross multiply
   9,321.02x = 12,863.37 × 5,342.90
4. Step 4: Simplify right side
   9,321.02x = 68,727,672.86
5. Step 5: Solve for x
   x = 68,727,672.86/9,321.02
6. Step 6: Final answer
   x = 7,373.41