Finding the Third Proportional to 30,898.13 and 67,808.81

Step by Step Solution

1. Step 1: Write the proportion equation
   30,898.13 : 67,808.81 = 67,808.81 : x
2. Step 2: Convert to fraction form
   30,898.13/67,808.81 = 67,808.81/x
3. Step 3: Cross multiply
   30,898.13x = 67,808.81 × 67,808.81
4. Step 4: Simplify right side
   30,898.13x = 4,598,035,052.66
5. Step 5: Solve for x
   x = 4,598,035,052.66/30,898.13
6. Step 6: Final answer
   x = 148,812.75