Finding the Fourth Proportional to 1,997.51, 2,756.45 and 1,158.15

Step by Step Solution

1. Step 1: Write the proportion equation
   1,997.51 : 2,756.45 = 1,158.15 : x
2. Step 2: Convert to fraction form
   1,997.51/2,756.45 = 1,158.15/x
3. Step 3: Cross multiply
   1,997.51x = 2,756.45 × 1,158.15
4. Step 4: Simplify right side
   1,997.51x = 3,192,376.78
5. Step 5: Solve for x
   x = 3,192,376.78/1,997.51
6. Step 6: Final answer
   x = 1,598.18