Finding the Third Proportional to 42,817.50 and 68,190.75

Step by Step Solution

1. Step 1: Write the proportion equation
   42,817.50 : 68,190.75 = 68,190.75 : x
2. Step 2: Convert to fraction form
   42,817.50/68,190.75 = 68,190.75/x
3. Step 3: Cross multiply
   42,817.50x = 68,190.75 × 68,190.75
4. Step 4: Simplify right side
   42,817.50x = 4,649,978,385.56
5. Step 5: Solve for x
   x = 4,649,978,385.56/42,817.50
6. Step 6: Final answer
   x = 108,599.95