Finding the Third Proportional to 81,510.75 and 168,259.50

Step by Step Solution

1. Step 1: Write the proportion equation
   81,510.75 : 168,259.50 = 168,259.50 : x
2. Step 2: Convert to fraction form
   81,510.75/168,259.50 = 168,259.50/x
3. Step 3: Cross multiply
   81,510.75x = 168,259.50 × 168,259.50
4. Step 4: Simplify right side
   81,510.75x = 28,311,259,340.25
5. Step 5: Solve for x
   x = 28,311,259,340.25/81,510.75
6. Step 6: Final answer
   x = 347,331.60