Finding the Third Proportional to 31,486.50 and 64,426.50

Step by Step Solution

1. Step 1: Write the proportion equation
   31,486.50 : 64,426.50 = 64,426.50 : x
2. Step 2: Convert to fraction form
   31,486.50/64,426.50 = 64,426.50/x
3. Step 3: Cross multiply
   31,486.50x = 64,426.50 × 64,426.50
4. Step 4: Simplify right side
   31,486.50x = 4,150,773,902.25
5. Step 5: Solve for x
   x = 4,150,773,902.25/31,486.50
6. Step 6: Final answer
   x = 131,827.10