Finding the Third Proportional to 42,318 and 65,737.50

Step by Step Solution

1. Step 1: Write the proportion equation
   42,318 : 65,737.50 = 65,737.50 : x
2. Step 2: Convert to fraction form
   42,318/65,737.50 = 65,737.50/x
3. Step 3: Cross multiply
   42,318x = 65,737.50 × 65,737.50
4. Step 4: Simplify right side
   42,318x = 4,321,418,906.25
5. Step 5: Solve for x
   x = 4,321,418,906.25/42,318
6. Step 6: Final answer
   x = 102,117.75