Finding the Fourth Proportional to 1,011.54, 1,395.56 and 662.42

Step by Step Solution

1. Step 1: Write the proportion equation
   1,011.54 : 1,395.56 = 662.42 : x
2. Step 2: Convert to fraction form
   1,011.54/1,395.56 = 662.42/x
3. Step 3: Cross multiply
   1,011.54x = 1,395.56 × 662.42
4. Step 4: Simplify right side
   1,011.54x = 924,446.86
5. Step 5: Solve for x
   x = 924,446.86/1,011.54
6. Step 6: Final answer
   x = 913.90