Finding the Third Proportional to 34,140 and 69,981

Step by Step Solution

1. Step 1: Write the proportion equation
   34,140 : 69,981 = 69,981 : x
2. Step 2: Convert to fraction form
   34,140/69,981 = 69,981/x
3. Step 3: Cross multiply
   34,140x = 69,981 × 69,981
4. Step 4: Simplify right side
   34,140x = 4,897,340,361
5. Step 5: Solve for x
   x = 4,897,340,361/34,140
6. Step 6: Final answer
   x = 143,448.75