Finding the Fourth Proportional to 2,452.91, 3,384.15 and 1,390.52

Step by Step Solution

1. Step 1: Write the proportion equation
   2,452.91 : 3,384.15 = 1,390.52 : x
2. Step 2: Convert to fraction form
   2,452.91/3,384.15 = 1,390.52/x
3. Step 3: Cross multiply
   2,452.91x = 3,384.15 × 1,390.52
4. Step 4: Simplify right side
   2,452.91x = 4,705,711.34
5. Step 5: Solve for x
   x = 4,705,711.34/2,452.91
6. Step 6: Final answer
   x = 1,918.42