Finding the Third Proportional to 86,429 and 141,129.50

Step by Step Solution

1. Step 1: Write the proportion equation
   86,429 : 141,129.50 = 141,129.50 : x
2. Step 2: Convert to fraction form
   86,429/141,129.50 = 141,129.50/x
3. Step 3: Cross multiply
   86,429x = 141,129.50 × 141,129.50
4. Step 4: Simplify right side
   86,429x = 19,917,535,770.25
5. Step 5: Solve for x
   x = 19,917,535,770.25/86,429
6. Step 6: Final answer
   x = 230,449.68