Finding the Fourth Proportional to 2,386.21, 3,290.28 and 1,545.85

Step by Step Solution

1. Step 1: Write the proportion equation
   2,386.21 : 3,290.28 = 1,545.85 : x
2. Step 2: Convert to fraction form
   2,386.21/3,290.28 = 1,545.85/x
3. Step 3: Cross multiply
   2,386.21x = 3,290.28 × 1,545.85
4. Step 4: Simplify right side
   2,386.21x = 5,086,279.34
5. Step 5: Solve for x
   x = 5,086,279.34/2,386.21
6. Step 6: Final answer
   x = 2,131.53