Finding the Fourth Proportional to 1,945.83, 2,686.19 and 1,821.50

Step by Step Solution

1. Step 1: Write the proportion equation
   1,945.83 : 2,686.19 = 1,821.50 : x
2. Step 2: Convert to fraction form
   1,945.83/2,686.19 = 1,821.50/x
3. Step 3: Cross multiply
   1,945.83x = 2,686.19 × 1,821.50
4. Step 4: Simplify right side
   1,945.83x = 4,892,872.55
5. Step 5: Solve for x
   x = 4,892,872.55/1,945.83
6. Step 6: Final answer
   x = 2,514.54