Finding the Fourth Proportional to 7,336.20, 10,123.72 and 3,978.84

Step by Step Solution

1. Step 1: Write the proportion equation
   7,336.20 : 10,123.72 = 3,978.84 : x
2. Step 2: Convert to fraction form
   7,336.20/10,123.72 = 3,978.84/x
3. Step 3: Cross multiply
   7,336.20x = 10,123.72 × 3,978.84
4. Step 4: Simplify right side
   7,336.20x = 40,280,662.08
5. Step 5: Solve for x
   x = 40,280,662.08/7,336.20
6. Step 6: Final answer
   x = 5,490.67