Finding the Fourth Proportional to 1,299.89, 1,793.86 and 710.42

Step by Step Solution

1. Step 1: Write the proportion equation
   1,299.89 : 1,793.86 = 710.42 : x
2. Step 2: Convert to fraction form
   1,299.89/1,793.86 = 710.42/x
3. Step 3: Cross multiply
   1,299.89x = 1,793.86 × 710.42
4. Step 4: Simplify right side
   1,299.89x = 1,274,394.37
5. Step 5: Solve for x
   x = 1,274,394.37/1,299.89
6. Step 6: Final answer
   x = 980.39