Finding the Third Proportional to 63,778.50 and 99,543.75

Step by Step Solution

1. Step 1: Write the proportion equation
   63,778.50 : 99,543.75 = 99,543.75 : x
2. Step 2: Convert to fraction form
   63,778.50/99,543.75 = 99,543.75/x
3. Step 3: Cross multiply
   63,778.50x = 99,543.75 × 99,543.75
4. Step 4: Simplify right side
   63,778.50x = 9,908,958,164.06
5. Step 5: Solve for x
   x = 9,908,958,164.06/63,778.50
6. Step 6: Final answer
   x = 155,365.18