Finding the Fourth Proportional to 1,997.12, 2,756.24 and 1,200.71

Step by Step Solution

1. Step 1: Write the proportion equation
   1,997.12 : 2,756.24 = 1,200.71 : x
2. Step 2: Convert to fraction form
   1,997.12/2,756.24 = 1,200.71/x
3. Step 3: Cross multiply
   1,997.12x = 2,756.24 × 1,200.71
4. Step 4: Simplify right side
   1,997.12x = 3,309,439.79
5. Step 5: Solve for x
   x = 3,309,439.79/1,997.12
6. Step 6: Final answer
   x = 1,657.10