Finding the Fourth Proportional to 5,112.28, 7,054.42 and 3,123.32

Step by Step Solution

1. Step 1: Write the proportion equation
   5,112.28 : 7,054.42 = 3,123.32 : x
2. Step 2: Convert to fraction form
   5,112.28/7,054.42 = 3,123.32/x
3. Step 3: Cross multiply
   5,112.28x = 7,054.42 × 3,123.32
4. Step 4: Simplify right side
   5,112.28x = 22,033,211.07
5. Step 5: Solve for x
   x = 22,033,211.07/5,112.28
6. Step 6: Final answer
   x = 4,309.86