Finding the Fourth Proportional to 5,139.59, 7,092.78 and 3,122.33

Step by Step Solution

1. Step 1: Write the proportion equation
   5,139.59 : 7,092.78 = 3,122.33 : x
2. Step 2: Convert to fraction form
   5,139.59/7,092.78 = 3,122.33/x
3. Step 3: Cross multiply
   5,139.59x = 7,092.78 × 3,122.33
4. Step 4: Simplify right side
   5,139.59x = 22,145,999.78
5. Step 5: Solve for x
   x = 22,145,999.78/5,139.59
6. Step 6: Final answer
   x = 4,308.90