Finding the Fourth Proportional to 1,002.48, 1,502.64 and 654.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,002.48 : 1,502.64 = 654.72 : x
2. Step 2: Convert to fraction form
   1,002.48/1,502.64 = 654.72/x
3. Step 3: Cross multiply
   1,002.48x = 1,502.64 × 654.72
4. Step 4: Simplify right side
   1,002.48x = 983,808.46
5. Step 5: Solve for x
   x = 983,808.46/1,002.48
6. Step 6: Final answer
   x = 981.37