Finding the Third Proportional to 68,166 and 139,723.88

Step by Step Solution

1. Step 1: Write the proportion equation
   68,166 : 139,723.88 = 139,723.88 : x
2. Step 2: Convert to fraction form
   68,166/139,723.88 = 139,723.88/x
3. Step 3: Cross multiply
   68,166x = 139,723.88 × 139,723.88
4. Step 4: Simplify right side
   68,166x = 19,522,761,245.02
5. Step 5: Solve for x
   x = 19,522,761,245.02/68,166
6. Step 6: Final answer
   x = 286,400.28