Finding the Fourth Proportional to 5,139.37, 7,087.45 and 3,543.46

Step by Step Solution

1. Step 1: Write the proportion equation
   5,139.37 : 7,087.45 = 3,543.46 : x
2. Step 2: Convert to fraction form
   5,139.37/7,087.45 = 3,543.46/x
3. Step 3: Cross multiply
   5,139.37x = 7,087.45 × 3,543.46
4. Step 4: Simplify right side
   5,139.37x = 25,114,115.51
5. Step 5: Solve for x
   x = 25,114,115.51/5,139.37
6. Step 6: Final answer
   x = 4,886.62