Finding the Third Proportional to 56,738 and 86,643

Step by Step Solution

1. Step 1: Write the proportion equation
   56,738 : 86,643 = 86,643 : x
2. Step 2: Convert to fraction form
   56,738/86,643 = 86,643/x
3. Step 3: Cross multiply
   56,738x = 86,643 × 86,643
4. Step 4: Simplify right side
   56,738x = 7,507,009,449
5. Step 5: Solve for x
   x = 7,507,009,449/56,738
6. Step 6: Final answer
   x = 132,310.08