Finding the Fourth Proportional to 1,253.74, 1,881.78 and 637.96

Step by Step Solution

1. Step 1: Write the proportion equation
   1,253.74 : 1,881.78 = 637.96 : x
2. Step 2: Convert to fraction form
   1,253.74/1,881.78 = 637.96/x
3. Step 3: Cross multiply
   1,253.74x = 1,881.78 × 637.96
4. Step 4: Simplify right side
   1,253.74x = 1,200,500.37
5. Step 5: Solve for x
   x = 1,200,500.37/1,253.74
6. Step 6: Final answer
   x = 957.54