Finding the Fourth Proportional to 2,648.50, 3,973.02 and 917.12

Step by Step Solution

1. Step 1: Write the proportion equation
   2,648.50 : 3,973.02 = 917.12 : x
2. Step 2: Convert to fraction form
   2,648.50/3,973.02 = 917.12/x
3. Step 3: Cross multiply
   2,648.50x = 3,973.02 × 917.12
4. Step 4: Simplify right side
   2,648.50x = 3,643,736.10
5. Step 5: Solve for x
   x = 3,643,736.10/2,648.50
6. Step 6: Final answer
   x = 1,375.77