Finding the Fourth Proportional to 1,300.79, 1,795.11 and 711.38

Step by Step Solution

1. Step 1: Write the proportion equation
   1,300.79 : 1,795.11 = 711.38 : x
2. Step 2: Convert to fraction form
   1,300.79/1,795.11 = 711.38/x
3. Step 3: Cross multiply
   1,300.79x = 1,795.11 × 711.38
4. Step 4: Simplify right side
   1,300.79x = 1,277,005.35
5. Step 5: Solve for x
   x = 1,277,005.35/1,300.79
6. Step 6: Final answer
   x = 981.72