Finding the Fourth Proportional to 1,015.48, 1,522.14 and 667.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,015.48 : 1,522.14 = 667.72 : x
2. Step 2: Convert to fraction form
   1,015.48/1,522.14 = 667.72/x
3. Step 3: Cross multiply
   1,015.48x = 1,522.14 × 667.72
4. Step 4: Simplify right side
   1,015.48x = 1,016,363.32
5. Step 5: Solve for x
   x = 1,016,363.32/1,015.48
6. Step 6: Final answer
   x = 1,000.87