Finding the Third Proportional to 69,429 and 149,405.25

Step by Step Solution

1. Step 1: Write the proportion equation
   69,429 : 149,405.25 = 149,405.25 : x
2. Step 2: Convert to fraction form
   69,429/149,405.25 = 149,405.25/x
3. Step 3: Cross multiply
   69,429x = 149,405.25 × 149,405.25
4. Step 4: Simplify right side
   69,429x = 22,321,928,727.56
5. Step 5: Solve for x
   x = 22,321,928,727.56/69,429
6. Step 6: Final answer
   x = 321,507.28