Finding the Fourth Proportional to 1,789.09, 2,681.72 and 748.31

Step by Step Solution

1. Step 1: Write the proportion equation
   1,789.09 : 2,681.72 = 748.31 : x
2. Step 2: Convert to fraction form
   1,789.09/2,681.72 = 748.31/x
3. Step 3: Cross multiply
   1,789.09x = 2,681.72 × 748.31
4. Step 4: Simplify right side
   1,789.09x = 2,006,741.44
5. Step 5: Solve for x
   x = 2,006,741.44/1,789.09
6. Step 6: Final answer
   x = 1,121.66