Finding the Fourth Proportional to 9,422.76, 13,003.80 and 5,231

Step by Step Solution

1. Step 1: Write the proportion equation
   9,422.76 : 13,003.80 = 5,231 : x
2. Step 2: Convert to fraction form
   9,422.76/13,003.80 = 5,231/x
3. Step 3: Cross multiply
   9,422.76x = 13,003.80 × 5,231
4. Step 4: Simplify right side
   9,422.76x = 68,022,877.80
5. Step 5: Solve for x
   x = 68,022,877.80/9,422.76
6. Step 6: Final answer
   x = 7,219.00