Finding the Fourth Proportional to 2,648.98, 3,973.65 and 917.02

Step by Step Solution

1. Step 1: Write the proportion equation
   2,648.98 : 3,973.65 = 917.02 : x
2. Step 2: Convert to fraction form
   2,648.98/3,973.65 = 917.02/x
3. Step 3: Cross multiply
   2,648.98x = 3,973.65 × 917.02
4. Step 4: Simplify right side
   2,648.98x = 3,643,916.52
5. Step 5: Solve for x
   x = 3,643,916.52/2,648.98
6. Step 6: Final answer
   x = 1,375.59