Finding the Third Proportional to 141,129 and 218,605.50

Step by Step Solution

1. Step 1: Write the proportion equation
   141,129 : 218,605.50 = 218,605.50 : x
2. Step 2: Convert to fraction form
   141,129/218,605.50 = 218,605.50/x
3. Step 3: Cross multiply
   141,129x = 218,605.50 × 218,605.50
4. Step 4: Simplify right side
   141,129x = 47,788,364,630.25
5. Step 5: Solve for x
   x = 47,788,364,630.25/141,129
6. Step 6: Final answer
   x = 338,614.78