Finding the Fourth Proportional to 1,182.51, 1,631.61 and 716.76

Step by Step Solution

1. Step 1: Write the proportion equation
   1,182.51 : 1,631.61 = 716.76 : x
2. Step 2: Convert to fraction form
   1,182.51/1,631.61 = 716.76/x
3. Step 3: Cross multiply
   1,182.51x = 1,631.61 × 716.76
4. Step 4: Simplify right side
   1,182.51x = 1,169,472.78
5. Step 5: Solve for x
   x = 1,169,472.78/1,182.51
6. Step 6: Final answer
   x = 988.97