Finding the Fourth Proportional to 1,722.11, 2,581.52 and 748.89

Step by Step Solution

1. Step 1: Write the proportion equation
   1,722.11 : 2,581.52 = 748.89 : x
2. Step 2: Convert to fraction form
   1,722.11/2,581.52 = 748.89/x
3. Step 3: Cross multiply
   1,722.11x = 2,581.52 × 748.89
4. Step 4: Simplify right side
   1,722.11x = 1,933,270.77
5. Step 5: Solve for x
   x = 1,933,270.77/1,722.11
6. Step 6: Final answer
   x = 1,122.62