Finding the Fourth Proportional to 3,736.32, 5,561.60 and 3,680.80

Step by Step Solution

1. Step 1: Write the proportion equation
   3,736.32 : 5,561.60 = 3,680.80 : x
2. Step 2: Convert to fraction form
   3,736.32/5,561.60 = 3,680.80/x
3. Step 3: Cross multiply
   3,736.32x = 5,561.60 × 3,680.80
4. Step 4: Simplify right side
   3,736.32x = 20,471,137.28
5. Step 5: Solve for x
   x = 20,471,137.28/3,736.32
6. Step 6: Final answer
   x = 5,478.96