Finding the Fourth Proportional to 2,648.37, 3,972.83 and 916.59

Step by Step Solution

1. Step 1: Write the proportion equation
   2,648.37 : 3,972.83 = 916.59 : x
2. Step 2: Convert to fraction form
   2,648.37/3,972.83 = 916.59/x
3. Step 3: Cross multiply
   2,648.37x = 3,972.83 × 916.59
4. Step 4: Simplify right side
   2,648.37x = 3,641,451.67
5. Step 5: Solve for x
   x = 3,641,451.67/2,648.37
6. Step 6: Final answer
   x = 1,374.98