Finding the Fourth Proportional to 7,336.28, 10,123.91 and 3,978.97

Step by Step Solution

1. Step 1: Write the proportion equation
   7,336.28 : 10,123.91 = 3,978.97 : x
2. Step 2: Convert to fraction form
   7,336.28/10,123.91 = 3,978.97/x
3. Step 3: Cross multiply
   7,336.28x = 10,123.91 × 3,978.97
4. Step 4: Simplify right side
   7,336.28x = 40,282,734.17
5. Step 5: Solve for x
   x = 40,282,734.17/7,336.28
6. Step 6: Final answer
   x = 5,490.89