Finding the Fourth Proportional to 1,045.50, 1,442.81 and 625.87

Step by Step Solution

1. Step 1: Write the proportion equation
   1,045.50 : 1,442.81 = 625.87 : x
2. Step 2: Convert to fraction form
   1,045.50/1,442.81 = 625.87/x
3. Step 3: Cross multiply
   1,045.50x = 1,442.81 × 625.87
4. Step 4: Simplify right side
   1,045.50x = 903,002.05
5. Step 5: Solve for x
   x = 903,002.05/1,045.50
6. Step 6: Final answer
   x = 863.71