Finding the Fourth Proportional to 2,861.94, 4,292.78 and 887.50

Step by Step Solution

1. Step 1: Write the proportion equation
   2,861.94 : 4,292.78 = 887.50 : x
2. Step 2: Convert to fraction form
   2,861.94/4,292.78 = 887.50/x
3. Step 3: Cross multiply
   2,861.94x = 4,292.78 × 887.50
4. Step 4: Simplify right side
   2,861.94x = 3,809,842.25
5. Step 5: Solve for x
   x = 3,809,842.25/2,861.94
6. Step 6: Final answer
   x = 1,331.21