Finding the Fourth Proportional to 2,112.50, 3,168.76 and 744.50

Step by Step Solution

1. Step 1: Write the proportion equation
   2,112.50 : 3,168.76 = 744.50 : x
2. Step 2: Convert to fraction form
   2,112.50/3,168.76 = 744.50/x
3. Step 3: Cross multiply
   2,112.50x = 3,168.76 × 744.50
4. Step 4: Simplify right side
   2,112.50x = 2,359,141.82
5. Step 5: Solve for x
   x = 2,359,141.82/2,112.50
6. Step 6: Final answer
   x = 1,116.75