Finding the Fourth Proportional to 1,017.68, 1,404.39 and 619.46

Step by Step Solution

1. Step 1: Write the proportion equation
   1,017.68 : 1,404.39 = 619.46 : x
2. Step 2: Convert to fraction form
   1,017.68/1,404.39 = 619.46/x
3. Step 3: Cross multiply
   1,017.68x = 1,404.39 × 619.46
4. Step 4: Simplify right side
   1,017.68x = 869,963.43
5. Step 5: Solve for x
   x = 869,963.43/1,017.68
6. Step 6: Final answer
   x = 854.85