Finding the Fourth Proportional to 1,642.37, 2,266.43 and 896.31

Step by Step Solution

1. Step 1: Write the proportion equation
   1,642.37 : 2,266.43 = 896.31 : x
2. Step 2: Convert to fraction form
   1,642.37/2,266.43 = 896.31/x
3. Step 3: Cross multiply
   1,642.37x = 2,266.43 × 896.31
4. Step 4: Simplify right side
   1,642.37x = 2,031,419.39
5. Step 5: Solve for x
   x = 2,031,419.39/1,642.37
6. Step 6: Final answer
   x = 1,236.89