Finding the Fourth Proportional to 1,997.56, 2,756.38 and 1,113.20

Step by Step Solution

1. Step 1: Write the proportion equation
   1,997.56 : 2,756.38 = 1,113.20 : x
2. Step 2: Convert to fraction form
   1,997.56/2,756.38 = 1,113.20/x
3. Step 3: Cross multiply
   1,997.56x = 2,756.38 × 1,113.20
4. Step 4: Simplify right side
   1,997.56x = 3,068,402.22
5. Step 5: Solve for x
   x = 3,068,402.22/1,997.56
6. Step 6: Final answer
   x = 1,536.08