Finding the Fourth Proportional to 7,215.25, 9,957.81 and 4,233.60

Step by Step Solution

1. Step 1: Write the proportion equation
   7,215.25 : 9,957.81 = 4,233.60 : x
2. Step 2: Convert to fraction form
   7,215.25/9,957.81 = 4,233.60/x
3. Step 3: Cross multiply
   7,215.25x = 9,957.81 × 4,233.60
4. Step 4: Simplify right side
   7,215.25x = 42,157,384.42
5. Step 5: Solve for x
   x = 42,157,384.42/7,215.25
6. Step 6: Final answer
   x = 5,842.82