Finding the Fourth Proportional to 1,254.83, 1,881.02 and 638.42

Step by Step Solution

1. Step 1: Write the proportion equation
   1,254.83 : 1,881.02 = 638.42 : x
2. Step 2: Convert to fraction form
   1,254.83/1,881.02 = 638.42/x
3. Step 3: Cross multiply
   1,254.83x = 1,881.02 × 638.42
4. Step 4: Simplify right side
   1,254.83x = 1,200,872.98
5. Step 5: Solve for x
   x = 1,200,872.98/1,254.83
6. Step 6: Final answer
   x = 957.00