Finding the Fourth Proportional to 2,116.31, 3,174.86 and 655.12

Step by Step Solution

1. Step 1: Write the proportion equation
   2,116.31 : 3,174.86 = 655.12 : x
2. Step 2: Convert to fraction form
   2,116.31/3,174.86 = 655.12/x
3. Step 3: Cross multiply
   2,116.31x = 3,174.86 × 655.12
4. Step 4: Simplify right side
   2,116.31x = 2,079,907.98
5. Step 5: Solve for x
   x = 2,079,907.98/2,116.31
6. Step 6: Final answer
   x = 982.80