Finding the Third Proportional to 43,142 and 67,690.50

Step by Step Solution

1. Step 1: Write the proportion equation
   43,142 : 67,690.50 = 67,690.50 : x
2. Step 2: Convert to fraction form
   43,142/67,690.50 = 67,690.50/x
3. Step 3: Cross multiply
   43,142x = 67,690.50 × 67,690.50
4. Step 4: Simplify right side
   43,142x = 4,582,003,790.25
5. Step 5: Solve for x
   x = 4,582,003,790.25/43,142
6. Step 6: Final answer
   x = 106,207.50