Finding the Fourth Proportional to 3,643.92, 5,473.08 and 3,123.72

Step by Step Solution

1. Step 1: Write the proportion equation
   3,643.92 : 5,473.08 = 3,123.72 : x
2. Step 2: Convert to fraction form
   3,643.92/5,473.08 = 3,123.72/x
3. Step 3: Cross multiply
   3,643.92x = 5,473.08 × 3,123.72
4. Step 4: Simplify right side
   3,643.92x = 17,096,369.46
5. Step 5: Solve for x
   x = 17,096,369.46/3,643.92
6. Step 6: Final answer
   x = 4,691.75