Finding the Fourth Proportional to 7,225.31, 9,972.59 and 4,242.11

Step by Step Solution

1. Step 1: Write the proportion equation
   7,225.31 : 9,972.59 = 4,242.11 : x
2. Step 2: Convert to fraction form
   7,225.31/9,972.59 = 4,242.11/x
3. Step 3: Cross multiply
   7,225.31x = 9,972.59 × 4,242.11
4. Step 4: Simplify right side
   7,225.31x = 42,304,752.69
5. Step 5: Solve for x
   x = 42,304,752.69/7,225.31
6. Step 6: Final answer
   x = 5,855.08