Finding the Fourth Proportional to 1,139.33, 1,573.05 and 720.04

Step by Step Solution

1. Step 1: Write the proportion equation
   1,139.33 : 1,573.05 = 720.04 : x
2. Step 2: Convert to fraction form
   1,139.33/1,573.05 = 720.04/x
3. Step 3: Cross multiply
   1,139.33x = 1,573.05 × 720.04
4. Step 4: Simplify right side
   1,139.33x = 1,132,654.56
5. Step 5: Solve for x
   x = 1,132,654.56/1,139.33
6. Step 6: Final answer
   x = 994.14