Finding the Fourth Proportional to 1,997.67, 2,756.78 and 1,158.86

Step by Step Solution

1. Step 1: Write the proportion equation
   1,997.67 : 2,756.78 = 1,158.86 : x
2. Step 2: Convert to fraction form
   1,997.67/2,756.78 = 1,158.86/x
3. Step 3: Cross multiply
   1,997.67x = 2,756.78 × 1,158.86
4. Step 4: Simplify right side
   1,997.67x = 3,194,727.51
5. Step 5: Solve for x
   x = 3,194,727.51/1,997.67
6. Step 6: Final answer
   x = 1,599.22