Finding the Fourth Proportional to 1,488.14, 2,231.42 and 654.86

Step by Step Solution

1. Step 1: Write the proportion equation
   1,488.14 : 2,231.42 = 654.86 : x
2. Step 2: Convert to fraction form
   1,488.14/2,231.42 = 654.86/x
3. Step 3: Cross multiply
   1,488.14x = 2,231.42 × 654.86
4. Step 4: Simplify right side
   1,488.14x = 1,461,253.27
5. Step 5: Solve for x
   x = 1,461,253.27/1,488.14
6. Step 6: Final answer
   x = 981.94