Finding the Third Proportional to 430.31 and 799.31

Step by Step Solution

1. Step 1: Write the proportion equation
   430.31 : 799.31 = 799.31 : x
2. Step 2: Convert to fraction form
   430.31/799.31 = 799.31/x
3. Step 3: Cross multiply
   430.31x = 799.31 × 799.31
4. Step 4: Simplify right side
   430.31x = 638,900.47
5. Step 5: Solve for x
   x = 638,900.47/430.31
6. Step 6: Final answer
   x = 1,484.74