Finding the Fourth Proportional to 5,139.30, 7,088.06 and 3,545.57

Step by Step Solution

1. Step 1: Write the proportion equation
   5,139.30 : 7,088.06 = 3,545.57 : x
2. Step 2: Convert to fraction form
   5,139.30/7,088.06 = 3,545.57/x
3. Step 3: Cross multiply
   5,139.30x = 7,088.06 × 3,545.57
4. Step 4: Simplify right side
   5,139.30x = 25,131,219.53
5. Step 5: Solve for x
   x = 25,131,219.53/5,139.30
6. Step 6: Final answer
   x = 4,890.01