Finding the Third Proportional to 69,709 and 148,410

Step by Step Solution

1. Step 1: Write the proportion equation
   69,709 : 148,410 = 148,410 : x
2. Step 2: Convert to fraction form
   69,709/148,410 = 148,410/x
3. Step 3: Cross multiply
   69,709x = 148,410 × 148,410
4. Step 4: Simplify right side
   69,709x = 22,025,528,100
5. Step 5: Solve for x
   x = 22,025,528,100/69,709
6. Step 6: Final answer
   x = 315,963.91