Finding the Fourth Proportional to 1,019.43, 1,525.91 and 671.94

Step by Step Solution

1. Step 1: Write the proportion equation
   1,019.43 : 1,525.91 = 671.94 : x
2. Step 2: Convert to fraction form
   1,019.43/1,525.91 = 671.94/x
3. Step 3: Cross multiply
   1,019.43x = 1,525.91 × 671.94
4. Step 4: Simplify right side
   1,019.43x = 1,025,316.61
5. Step 5: Solve for x
   x = 1,025,316.61/1,019.43
6. Step 6: Final answer
   x = 1,005.77