Finding the Fourth Proportional to 2,128.64, 3,191.59 and 741.88

Step by Step Solution

1. Step 1: Write the proportion equation
   2,128.64 : 3,191.59 = 741.88 : x
2. Step 2: Convert to fraction form
   2,128.64/3,191.59 = 741.88/x
3. Step 3: Cross multiply
   2,128.64x = 3,191.59 × 741.88
4. Step 4: Simplify right side
   2,128.64x = 2,367,758.98
5. Step 5: Solve for x
   x = 2,367,758.98/2,128.64
6. Step 6: Final answer
   x = 1,112.33