Finding the Third Proportional to 67,972.50 and 145,789.88

Step by Step Solution

1. Step 1: Write the proportion equation
   67,972.50 : 145,789.88 = 145,789.88 : x
2. Step 2: Convert to fraction form
   67,972.50/145,789.88 = 145,789.88/x
3. Step 3: Cross multiply
   67,972.50x = 145,789.88 × 145,789.88
4. Step 4: Simplify right side
   67,972.50x = 21,254,687,652.52
5. Step 5: Solve for x
   x = 21,254,687,652.52/67,972.50
6. Step 6: Final answer
   x = 312,695.39