Finding the Fourth Proportional to 1,002.27, 1,500.96 and 612.45

Step by Step Solution

1. Step 1: Write the proportion equation
   1,002.27 : 1,500.96 = 612.45 : x
2. Step 2: Convert to fraction form
   1,002.27/1,500.96 = 612.45/x
3. Step 3: Cross multiply
   1,002.27x = 1,500.96 × 612.45
4. Step 4: Simplify right side
   1,002.27x = 919,262.95
5. Step 5: Solve for x
   x = 919,262.95/1,002.27
6. Step 6: Final answer
   x = 917.18