Finding the Fourth Proportional to 3,091.61, 4,638.17 and 900.35

Step by Step Solution

1. Step 1: Write the proportion equation
   3,091.61 : 4,638.17 = 900.35 : x
2. Step 2: Convert to fraction form
   3,091.61/4,638.17 = 900.35/x
3. Step 3: Cross multiply
   3,091.61x = 4,638.17 × 900.35
4. Step 4: Simplify right side
   3,091.61x = 4,175,998.90
5. Step 5: Solve for x
   x = 4,175,998.90/3,091.61
6. Step 6: Final answer
   x = 1,350.75