Finding the Fourth Proportional to 1,008.16, 1,389.72 and 745.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,008.16 : 1,389.72 = 745.72 : x
2. Step 2: Convert to fraction form
   1,008.16/1,389.72 = 745.72/x
3. Step 3: Cross multiply
   1,008.16x = 1,389.72 × 745.72
4. Step 4: Simplify right side
   1,008.16x = 1,036,342.00
5. Step 5: Solve for x
   x = 1,036,342.00/1,008.16
6. Step 6: Final answer
   x = 1,027.95