Finding the Third Proportional to 86,168.81 and 124,109.72

Step by Step Solution

1. Step 1: Write the proportion equation
   86,168.81 : 124,109.72 = 124,109.72 : x
2. Step 2: Convert to fraction form
   86,168.81/124,109.72 = 124,109.72/x
3. Step 3: Cross multiply
   86,168.81x = 124,109.72 × 124,109.72
4. Step 4: Simplify right side
   86,168.81x = 15,403,222,288.20
5. Step 5: Solve for x
   x = 15,403,222,288.20/86,168.81
6. Step 6: Final answer
   x = 178,756.35