Finding the Fourth Proportional to 1,997.39, 2,756.34 and 1,157.55

Step by Step Solution

1. Step 1: Write the proportion equation
   1,997.39 : 2,756.34 = 1,157.55 : x
2. Step 2: Convert to fraction form
   1,997.39/2,756.34 = 1,157.55/x
3. Step 3: Cross multiply
   1,997.39x = 2,756.34 × 1,157.55
4. Step 4: Simplify right side
   1,997.39x = 3,190,601.37
5. Step 5: Solve for x
   x = 3,190,601.37/1,997.39
6. Step 6: Final answer
   x = 1,597.39