Finding the Fourth Proportional to 1,151.91, 1,588.98 and 709.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,151.91 : 1,588.98 = 709.72 : x
2. Step 2: Convert to fraction form
   1,151.91/1,588.98 = 709.72/x
3. Step 3: Cross multiply
   1,151.91x = 1,588.98 × 709.72
4. Step 4: Simplify right side
   1,151.91x = 1,127,730.89
5. Step 5: Solve for x
   x = 1,127,730.89/1,151.91
6. Step 6: Final answer
   x = 979.01