Finding the Third Proportional to 105,811.31 and 163,906.03

Step by Step Solution

1. Step 1: Write the proportion equation
   105,811.31 : 163,906.03 = 163,906.03 : x
2. Step 2: Convert to fraction form
   105,811.31/163,906.03 = 163,906.03/x
3. Step 3: Cross multiply
   105,811.31x = 163,906.03 × 163,906.03
4. Step 4: Simplify right side
   105,811.31x = 26,865,187,080.13
5. Step 5: Solve for x
   x = 26,865,187,080.13/105,811.31
6. Step 6: Final answer
   x = 253,897.12