Finding the Fourth Proportional to 2,447.57, 3,672.12 and 781.94

Step by Step Solution

1. Step 1: Write the proportion equation
   2,447.57 : 3,672.12 = 781.94 : x
2. Step 2: Convert to fraction form
   2,447.57/3,672.12 = 781.94/x
3. Step 3: Cross multiply
   2,447.57x = 3,672.12 × 781.94
4. Step 4: Simplify right side
   2,447.57x = 2,871,377.51
5. Step 5: Solve for x
   x = 2,871,377.51/2,447.57
6. Step 6: Final answer
   x = 1,173.15