Finding the Third Proportional to 70,708.50 and 148,688.50

Step by Step Solution

1. Step 1: Write the proportion equation
   70,708.50 : 148,688.50 = 148,688.50 : x
2. Step 2: Convert to fraction form
   70,708.50/148,688.50 = 148,688.50/x
3. Step 3: Cross multiply
   70,708.50x = 148,688.50 × 148,688.50
4. Step 4: Simplify right side
   70,708.50x = 22,108,270,032.25
5. Step 5: Solve for x
   x = 22,108,270,032.25/70,708.50
6. Step 6: Final answer
   x = 312,667.78