Finding the Fourth Proportional to 5,139.51, 7,085.47 and 3,250.15

Step by Step Solution

1. Step 1: Write the proportion equation
   5,139.51 : 7,085.47 = 3,250.15 : x
2. Step 2: Convert to fraction form
   5,139.51/7,085.47 = 3,250.15/x
3. Step 3: Cross multiply
   5,139.51x = 7,085.47 × 3,250.15
4. Step 4: Simplify right side
   5,139.51x = 23,028,840.32
5. Step 5: Solve for x
   x = 23,028,840.32/5,139.51
6. Step 6: Final answer
   x = 4,480.75