Finding the Third Proportional to 130.13 and 280.31

Step by Step Solution

1. Step 1: Write the proportion equation
   130.13 : 280.31 = 280.31 : x
2. Step 2: Convert to fraction form
   130.13/280.31 = 280.31/x
3. Step 3: Cross multiply
   130.13x = 280.31 × 280.31
4. Step 4: Simplify right side
   130.13x = 78,575.10
5. Step 5: Solve for x
   x = 78,575.10/130.13
6. Step 6: Final answer
   x = 603.84