Finding the Fourth Proportional to 1,017.81, 1,404.68 and 625.10

Step by Step Solution

1. Step 1: Write the proportion equation
   1,017.81 : 1,404.68 = 625.10 : x
2. Step 2: Convert to fraction form
   1,017.81/1,404.68 = 625.10/x
3. Step 3: Cross multiply
   1,017.81x = 1,404.68 × 625.10
4. Step 4: Simplify right side
   1,017.81x = 878,055.32
5. Step 5: Solve for x
   x = 878,055.32/1,017.81
6. Step 6: Final answer
   x = 862.69