Finding the Fourth Proportional to 1,083.12, 1,493.72 and 709.96

Step by Step Solution

1. Step 1: Write the proportion equation
   1,083.12 : 1,493.72 = 709.96 : x
2. Step 2: Convert to fraction form
   1,083.12/1,493.72 = 709.96/x
3. Step 3: Cross multiply
   1,083.12x = 1,493.72 × 709.96
4. Step 4: Simplify right side
   1,083.12x = 1,060,477.90
5. Step 5: Solve for x
   x = 1,060,477.90/1,083.12
6. Step 6: Final answer
   x = 979.10