Finding the Fourth Proportional to 1,722.81, 2,583.77 and 748.69

Step by Step Solution

1. Step 1: Write the proportion equation
   1,722.81 : 2,583.77 = 748.69 : x
2. Step 2: Convert to fraction form
   1,722.81/2,583.77 = 748.69/x
3. Step 3: Cross multiply
   1,722.81x = 2,583.77 × 748.69
4. Step 4: Simplify right side
   1,722.81x = 1,934,432.56
5. Step 5: Solve for x
   x = 1,934,432.56/1,722.81
6. Step 6: Final answer
   x = 1,122.83