Finding the Fourth Proportional to 1,642.05, 2,463.98 and 911.52

Step by Step Solution

1. Step 1: Write the proportion equation
   1,642.05 : 2,463.98 = 911.52 : x
2. Step 2: Convert to fraction form
   1,642.05/2,463.98 = 911.52/x
3. Step 3: Cross multiply
   1,642.05x = 2,463.98 × 911.52
4. Step 4: Simplify right side
   1,642.05x = 2,245,962.49
5. Step 5: Solve for x
   x = 2,245,962.49/1,642.05
6. Step 6: Final answer
   x = 1,367.78