Finding the Fourth Proportional to 2,591.86, 3,553.51 and 2,545.20

Step by Step Solution

1. Step 1: Write the proportion equation
   2,591.86 : 3,553.51 = 2,545.20 : x
2. Step 2: Convert to fraction form
   2,591.86/3,553.51 = 2,545.20/x
3. Step 3: Cross multiply
   2,591.86x = 3,553.51 × 2,545.20
4. Step 4: Simplify right side
   2,591.86x = 9,044,393.65
5. Step 5: Solve for x
   x = 9,044,393.65/2,591.86
6. Step 6: Final answer
   x = 3,489.54