Finding the Fourth Proportional to 2,167.31, 3,251.16 and 607.31

Step by Step Solution

1. Step 1: Write the proportion equation
   2,167.31 : 3,251.16 = 607.31 : x
2. Step 2: Convert to fraction form
   2,167.31/3,251.16 = 607.31/x
3. Step 3: Cross multiply
   2,167.31x = 3,251.16 × 607.31
4. Step 4: Simplify right side
   2,167.31x = 1,974,445.72
5. Step 5: Solve for x
   x = 1,974,445.72/2,167.31
6. Step 6: Final answer
   x = 911.01