Finding the Third Proportional to 74,990.81 and 105,469.59

Step by Step Solution

1. Step 1: Write the proportion equation
   74,990.81 : 105,469.59 = 105,469.59 : x
2. Step 2: Convert to fraction form
   74,990.81/105,469.59 = 105,469.59/x
3. Step 3: Cross multiply
   74,990.81x = 105,469.59 × 105,469.59
4. Step 4: Simplify right side
   74,990.81x = 11,123,835,205.79
5. Step 5: Solve for x
   x = 11,123,835,205.79/74,990.81
6. Step 6: Final answer
   x = 148,335.97