Finding the Fourth Proportional to 1,634.34, 2,453.98 and 815.42

Step by Step Solution

1. Step 1: Write the proportion equation
   1,634.34 : 2,453.98 = 815.42 : x
2. Step 2: Convert to fraction form
   1,634.34/2,453.98 = 815.42/x
3. Step 3: Cross multiply
   1,634.34x = 2,453.98 × 815.42
4. Step 4: Simplify right side
   1,634.34x = 2,001,024.37
5. Step 5: Solve for x
   x = 2,001,024.37/1,634.34
6. Step 6: Final answer
   x = 1,224.36