Finding the Fourth Proportional to 5,139.48, 7,092.80 and 2,900.54

Step by Step Solution

1. Step 1: Write the proportion equation
   5,139.48 : 7,092.80 = 2,900.54 : x
2. Step 2: Convert to fraction form
   5,139.48/7,092.80 = 2,900.54/x
3. Step 3: Cross multiply
   5,139.48x = 7,092.80 × 2,900.54
4. Step 4: Simplify right side
   5,139.48x = 20,572,900.15
5. Step 5: Solve for x
   x = 20,572,900.15/5,139.48
6. Step 6: Final answer
   x = 4,002.91