Finding the Fourth Proportional to 7,132.78, 9,842.83 and 3,945.89

Step by Step Solution

1. Step 1: Write the proportion equation
   7,132.78 : 9,842.83 = 3,945.89 : x
2. Step 2: Convert to fraction form
   7,132.78/9,842.83 = 3,945.89/x
3. Step 3: Cross multiply
   7,132.78x = 9,842.83 × 3,945.89
4. Step 4: Simplify right side
   7,132.78x = 38,838,724.47
5. Step 5: Solve for x
   x = 38,838,724.47/7,132.78
6. Step 6: Final answer
   x = 5,445.10