Finding the Fourth Proportional to 1,149.59, 1,722.28 and 738.78

Step by Step Solution

1. Step 1: Write the proportion equation
   1,149.59 : 1,722.28 = 738.78 : x
2. Step 2: Convert to fraction form
   1,149.59/1,722.28 = 738.78/x
3. Step 3: Cross multiply
   1,149.59x = 1,722.28 × 738.78
4. Step 4: Simplify right side
   1,149.59x = 1,272,386.02
5. Step 5: Solve for x
   x = 1,272,386.02/1,149.59
6. Step 6: Final answer
   x = 1,106.82