Finding the Third Proportional to 31,242 and 67,404.75

Step by Step Solution

1. Step 1: Write the proportion equation
   31,242 : 67,404.75 = 67,404.75 : x
2. Step 2: Convert to fraction form
   31,242/67,404.75 = 67,404.75/x
3. Step 3: Cross multiply
   31,242x = 67,404.75 × 67,404.75
4. Step 4: Simplify right side
   31,242x = 4,543,400,322.56
5. Step 5: Solve for x
   x = 4,543,400,322.56/31,242
6. Step 6: Final answer
   x = 145,426.04