Finding the Third Proportional to 42,217.50 and 64,730.25

Step by Step Solution

1. Step 1: Write the proportion equation
   42,217.50 : 64,730.25 = 64,730.25 : x
2. Step 2: Convert to fraction form
   42,217.50/64,730.25 = 64,730.25/x
3. Step 3: Cross multiply
   42,217.50x = 64,730.25 × 64,730.25
4. Step 4: Simplify right side
   42,217.50x = 4,190,005,265.06
5. Step 5: Solve for x
   x = 4,190,005,265.06/42,217.50
6. Step 6: Final answer
   x = 99,248.07