Finding the Fourth Proportional to 2,522.43, 3,785.99 and 1,290.72

Step by Step Solution

1. Step 1: Write the proportion equation
   2,522.43 : 3,785.99 = 1,290.72 : x
2. Step 2: Convert to fraction form
   2,522.43/3,785.99 = 1,290.72/x
3. Step 3: Cross multiply
   2,522.43x = 3,785.99 × 1,290.72
4. Step 4: Simplify right side
   2,522.43x = 4,886,646.56
5. Step 5: Solve for x
   x = 4,886,646.56/2,522.43
6. Step 6: Final answer
   x = 1,937.28