Finding the Fourth Proportional to 2,590.72, 3,886.68 and 741.78

Step by Step Solution

1. Step 1: Write the proportion equation
   2,590.72 : 3,886.68 = 741.78 : x
2. Step 2: Convert to fraction form
   2,590.72/3,886.68 = 741.78/x
3. Step 3: Cross multiply
   2,590.72x = 3,886.68 × 741.78
4. Step 4: Simplify right side
   2,590.72x = 2,883,061.49
5. Step 5: Solve for x
   x = 2,883,061.49/2,590.72
6. Step 6: Final answer
   x = 1,112.84