Finding the Fourth Proportional to 1,609.32, 2,411.82 and 877.80

Step by Step Solution

1. Step 1: Write the proportion equation
   1,609.32 : 2,411.82 = 877.80 : x
2. Step 2: Convert to fraction form
   1,609.32/2,411.82 = 877.80/x
3. Step 3: Cross multiply
   1,609.32x = 2,411.82 × 877.80
4. Step 4: Simplify right side
   1,609.32x = 2,117,095.60
5. Step 5: Solve for x
   x = 2,117,095.60/1,609.32
6. Step 6: Final answer
   x = 1,315.52