Finding the Fourth Proportional to 2,085.85, 3,123.48 and 1,252.40

Step by Step Solution

1. Step 1: Write the proportion equation
   2,085.85 : 3,123.48 = 1,252.40 : x
2. Step 2: Convert to fraction form
   2,085.85/3,123.48 = 1,252.40/x
3. Step 3: Cross multiply
   2,085.85x = 3,123.48 × 1,252.40
4. Step 4: Simplify right side
   2,085.85x = 3,911,830.73
5. Step 5: Solve for x
   x = 3,911,830.73/2,085.85
6. Step 6: Final answer
   x = 1,875.42