Finding the Fourth Proportional to 1,608.57, 2,411.91 and 877.95

Step by Step Solution

1. Step 1: Write the proportion equation
   1,608.57 : 2,411.91 = 877.95 : x
2. Step 2: Convert to fraction form
   1,608.57/2,411.91 = 877.95/x
3. Step 3: Cross multiply
   1,608.57x = 2,411.91 × 877.95
4. Step 4: Simplify right side
   1,608.57x = 2,117,536.38
5. Step 5: Solve for x
   x = 2,117,536.38/1,608.57
6. Step 6: Final answer
   x = 1,316.41