Finding the Fourth Proportional to 1,181.69, 1,630.27 and 709.60

Step by Step Solution

1. Step 1: Write the proportion equation
   1,181.69 : 1,630.27 = 709.60 : x
2. Step 2: Convert to fraction form
   1,181.69/1,630.27 = 709.60/x
3. Step 3: Cross multiply
   1,181.69x = 1,630.27 × 709.60
4. Step 4: Simplify right side
   1,181.69x = 1,156,839.59
5. Step 5: Solve for x
   x = 1,156,839.59/1,181.69
6. Step 6: Final answer
   x = 978.97