Finding the Fourth Proportional to 3,091.59, 4,638.20 and 900.34

Step by Step Solution

1. Step 1: Write the proportion equation
   3,091.59 : 4,638.20 = 900.34 : x
2. Step 2: Convert to fraction form
   3,091.59/4,638.20 = 900.34/x
3. Step 3: Cross multiply
   3,091.59x = 4,638.20 × 900.34
4. Step 4: Simplify right side
   3,091.59x = 4,175,940.89
5. Step 5: Solve for x
   x = 4,175,940.89/3,091.59
6. Step 6: Final answer
   x = 1,350.74