Finding the Third Proportional to 30,319.13 and 70,816.31

Step by Step Solution

1. Step 1: Write the proportion equation
   30,319.13 : 70,816.31 = 70,816.31 : x
2. Step 2: Convert to fraction form
   30,319.13/70,816.31 = 70,816.31/x
3. Step 3: Cross multiply
   30,319.13x = 70,816.31 × 70,816.31
4. Step 4: Simplify right side
   30,319.13x = 5,014,950,116.10
5. Step 5: Solve for x
   x = 5,014,950,116.10/30,319.13
6. Step 6: Final answer
   x = 165,405.50