Finding the Fourth Proportional to 2,386.48, 3,290.30 and 1,545.70

Step by Step Solution

1. Step 1: Write the proportion equation
   2,386.48 : 3,290.30 = 1,545.70 : x
2. Step 2: Convert to fraction form
   2,386.48/3,290.30 = 1,545.70/x
3. Step 3: Cross multiply
   2,386.48x = 3,290.30 × 1,545.70
4. Step 4: Simplify right side
   2,386.48x = 5,085,816.71
5. Step 5: Solve for x
   x = 5,085,816.71/2,386.48
6. Step 6: Final answer
   x = 2,131.10