Finding the Fourth Proportional to 1,761.67, 2,642.55 and 607.42

Step by Step Solution

1. Step 1: Write the proportion equation
   1,761.67 : 2,642.55 = 607.42 : x
2. Step 2: Convert to fraction form
   1,761.67/2,642.55 = 607.42/x
3. Step 3: Cross multiply
   1,761.67x = 2,642.55 × 607.42
4. Step 4: Simplify right side
   1,761.67x = 1,605,137.72
5. Step 5: Solve for x
   x = 1,605,137.72/1,761.67
6. Step 6: Final answer
   x = 911.15