Finding the Fourth Proportional to 5,573.88, 7,688.52 and 3,688.20

Step by Step Solution

1. Step 1: Write the proportion equation
   5,573.88 : 7,688.52 = 3,688.20 : x
2. Step 2: Convert to fraction form
   5,573.88/7,688.52 = 3,688.20/x
3. Step 3: Cross multiply
   5,573.88x = 7,688.52 × 3,688.20
4. Step 4: Simplify right side
   5,573.88x = 28,356,799.46
5. Step 5: Solve for x
   x = 28,356,799.46/5,573.88
6. Step 6: Final answer
   x = 5,087.44