Finding the Fourth Proportional to 1,578.88, 2,366.50 and 885.86

Step by Step Solution

1. Step 1: Write the proportion equation
   1,578.88 : 2,366.50 = 885.86 : x
2. Step 2: Convert to fraction form
   1,578.88/2,366.50 = 885.86/x
3. Step 3: Cross multiply
   1,578.88x = 2,366.50 × 885.86
4. Step 4: Simplify right side
   1,578.88x = 2,096,387.69
5. Step 5: Solve for x
   x = 2,096,387.69/1,578.88
6. Step 6: Final answer
   x = 1,327.77