Finding the Third Proportional to 72,478.50 and 157,021.50

Step by Step Solution

1. Step 1: Write the proportion equation
   72,478.50 : 157,021.50 = 157,021.50 : x
2. Step 2: Convert to fraction form
   72,478.50/157,021.50 = 157,021.50/x
3. Step 3: Cross multiply
   72,478.50x = 157,021.50 × 157,021.50
4. Step 4: Simplify right side
   72,478.50x = 24,655,751,462.25
5. Step 5: Solve for x
   x = 24,655,751,462.25/72,478.50
6. Step 6: Final answer
   x = 340,180.21