Finding the Fourth Proportional to 2,131.71, 3,197.15 and 744.78

Step by Step Solution

1. Step 1: Write the proportion equation
   2,131.71 : 3,197.15 = 744.78 : x
2. Step 2: Convert to fraction form
   2,131.71/3,197.15 = 744.78/x
3. Step 3: Cross multiply
   2,131.71x = 3,197.15 × 744.78
4. Step 4: Simplify right side
   2,131.71x = 2,381,173.38
5. Step 5: Solve for x
   x = 2,381,173.38/2,131.71
6. Step 6: Final answer
   x = 1,117.03