Finding the Third Proportional to 64,690.50 and 100,419

Step by Step Solution

1. Step 1: Write the proportion equation
   64,690.50 : 100,419 = 100,419 : x
2. Step 2: Convert to fraction form
   64,690.50/100,419 = 100,419/x
3. Step 3: Cross multiply
   64,690.50x = 100,419 × 100,419
4. Step 4: Simplify right side
   64,690.50x = 10,083,975,561
5. Step 5: Solve for x
   x = 10,083,975,561/64,690.50
6. Step 6: Final answer
   x = 155,880.32