Finding the Third Proportional to 70,139.25 and 149,040

Step by Step Solution

1. Step 1: Write the proportion equation
   70,139.25 : 149,040 = 149,040 : x
2. Step 2: Convert to fraction form
   70,139.25/149,040 = 149,040/x
3. Step 3: Cross multiply
   70,139.25x = 149,040 × 149,040
4. Step 4: Simplify right side
   70,139.25x = 22,212,921,600
5. Step 5: Solve for x
   x = 22,212,921,600/70,139.25
6. Step 6: Final answer
   x = 316,697.45