Finding the Fourth Proportional to 1,078.72, 1,488.38 and 746.60

Step by Step Solution

1. Step 1: Write the proportion equation
   1,078.72 : 1,488.38 = 746.60 : x
2. Step 2: Convert to fraction form
   1,078.72/1,488.38 = 746.60/x
3. Step 3: Cross multiply
   1,078.72x = 1,488.38 × 746.60
4. Step 4: Simplify right side
   1,078.72x = 1,111,224.51
5. Step 5: Solve for x
   x = 1,111,224.51/1,078.72
6. Step 6: Final answer
   x = 1,030.13