Finding the Fourth Proportional to 5,111.54, 7,054.04 and 3,123.20

Step by Step Solution

1. Step 1: Write the proportion equation
   5,111.54 : 7,054.04 = 3,123.20 : x
2. Step 2: Convert to fraction form
   5,111.54/7,054.04 = 3,123.20/x
3. Step 3: Cross multiply
   5,111.54x = 7,054.04 × 3,123.20
4. Step 4: Simplify right side
   5,111.54x = 22,031,155.77
5. Step 5: Solve for x
   x = 22,031,155.77/5,111.54
6. Step 6: Final answer
   x = 4,310.08