Finding the Third Proportional to 70,258.50 and 147,859.50

Step by Step Solution

1. Step 1: Write the proportion equation
   70,258.50 : 147,859.50 = 147,859.50 : x
2. Step 2: Convert to fraction form
   70,258.50/147,859.50 = 147,859.50/x
3. Step 3: Cross multiply
   70,258.50x = 147,859.50 × 147,859.50
4. Step 4: Simplify right side
   70,258.50x = 21,862,431,740.25
5. Step 5: Solve for x
   x = 21,862,431,740.25/70,258.50
6. Step 6: Final answer
   x = 311,171.34