Finding the Third Proportional to 34,144.50 and 69,979.50

Step by Step Solution

1. Step 1: Write the proportion equation
   34,144.50 : 69,979.50 = 69,979.50 : x
2. Step 2: Convert to fraction form
   34,144.50/69,979.50 = 69,979.50/x
3. Step 3: Cross multiply
   34,144.50x = 69,979.50 × 69,979.50
4. Step 4: Simplify right side
   34,144.50x = 4,897,130,420.25
5. Step 5: Solve for x
   x = 4,897,130,420.25/34,144.50
6. Step 6: Final answer
   x = 143,423.70