Finding the Fourth Proportional to 2,623.88, 3,936.42 and 892.50

Step by Step Solution

1. Step 1: Write the proportion equation
   2,623.88 : 3,936.42 = 892.50 : x
2. Step 2: Convert to fraction form
   2,623.88/3,936.42 = 892.50/x
3. Step 3: Cross multiply
   2,623.88x = 3,936.42 × 892.50
4. Step 4: Simplify right side
   2,623.88x = 3,513,254.85
5. Step 5: Solve for x
   x = 3,513,254.85/2,623.88
6. Step 6: Final answer
   x = 1,338.96