Finding the Fourth Proportional to 1,029.56, 1,419.73 and 715.18

Step by Step Solution

1. Step 1: Write the proportion equation
   1,029.56 : 1,419.73 = 715.18 : x
2. Step 2: Convert to fraction form
   1,029.56/1,419.73 = 715.18/x
3. Step 3: Cross multiply
   1,029.56x = 1,419.73 × 715.18
4. Step 4: Simplify right side
   1,029.56x = 1,015,359.83
5. Step 5: Solve for x
   x = 1,015,359.83/1,029.56
6. Step 6: Final answer
   x = 986.21