Finding the Fourth Proportional to 2,116.52, 3,171.30 and 729.12

Step by Step Solution

1. Step 1: Write the proportion equation
   2,116.52 : 3,171.30 = 729.12 : x
2. Step 2: Convert to fraction form
   2,116.52/3,171.30 = 729.12/x
3. Step 3: Cross multiply
   2,116.52x = 3,171.30 × 729.12
4. Step 4: Simplify right side
   2,116.52x = 2,312,258.26
5. Step 5: Solve for x
   x = 2,312,258.26/2,116.52
6. Step 6: Final answer
   x = 1,092.48