Finding the Third Proportional to 105,656.50 and 216,171.50

Step by Step Solution

1. Step 1: Write the proportion equation
   105,656.50 : 216,171.50 = 216,171.50 : x
2. Step 2: Convert to fraction form
   105,656.50/216,171.50 = 216,171.50/x
3. Step 3: Cross multiply
   105,656.50x = 216,171.50 × 216,171.50
4. Step 4: Simplify right side
   105,656.50x = 46,730,117,412.25
5. Step 5: Solve for x
   x = 46,730,117,412.25/105,656.50
6. Step 6: Final answer
   x = 442,283.41