Finding the Fourth Proportional to 7,253.98, 9,945.30 and 7,122.76

Step by Step Solution

1. Step 1: Write the proportion equation
   7,253.98 : 9,945.30 = 7,122.76 : x
2. Step 2: Convert to fraction form
   7,253.98/9,945.30 = 7,122.76/x
3. Step 3: Cross multiply
   7,253.98x = 9,945.30 × 7,122.76
4. Step 4: Simplify right side
   7,253.98x = 70,838,001.91
5. Step 5: Solve for x
   x = 70,838,001.91/7,253.98
6. Step 6: Final answer
   x = 9,765.40