Finding the Fourth Proportional to 2,104.72, 3,157.72 and 1,237.20

Step by Step Solution

1. Step 1: Write the proportion equation
   2,104.72 : 3,157.72 = 1,237.20 : x
2. Step 2: Convert to fraction form
   2,104.72/3,157.72 = 1,237.20/x
3. Step 3: Cross multiply
   2,104.72x = 3,157.72 × 1,237.20
4. Step 4: Simplify right side
   2,104.72x = 3,906,731.18
5. Step 5: Solve for x
   x = 3,906,731.18/2,104.72
6. Step 6: Final answer
   x = 1,856.18