Finding the Fourth Proportional to 1,015.98, 1,401.90 and 567.74

Step by Step Solution

1. Step 1: Write the proportion equation
   1,015.98 : 1,401.90 = 567.74 : x
2. Step 2: Convert to fraction form
   1,015.98/1,401.90 = 567.74/x
3. Step 3: Cross multiply
   1,015.98x = 1,401.90 × 567.74
4. Step 4: Simplify right side
   1,015.98x = 795,914.71
5. Step 5: Solve for x
   x = 795,914.71/1,015.98
6. Step 6: Final answer
   x = 783.40