Finding the Third Proportional to 42,339 and 64,966.50

Step by Step Solution

1. Step 1: Write the proportion equation
   42,339 : 64,966.50 = 64,966.50 : x
2. Step 2: Convert to fraction form
   42,339/64,966.50 = 64,966.50/x
3. Step 3: Cross multiply
   42,339x = 64,966.50 × 64,966.50
4. Step 4: Simplify right side
   42,339x = 4,220,646,122.25
5. Step 5: Solve for x
   x = 4,220,646,122.25/42,339
6. Step 6: Final answer
   x = 99,686.96