Finding the Fourth Proportional to 1,014.89, 1,520.70 and 917.69

Step by Step Solution

1. Step 1: Write the proportion equation
   1,014.89 : 1,520.70 = 917.69 : x
2. Step 2: Convert to fraction form
   1,014.89/1,520.70 = 917.69/x
3. Step 3: Cross multiply
   1,014.89x = 1,520.70 × 917.69
4. Step 4: Simplify right side
   1,014.89x = 1,395,523.58
5. Step 5: Solve for x
   x = 1,395,523.58/1,014.89
6. Step 6: Final answer
   x = 1,375.06