Finding the Third Proportional to 141,800 and 212,700.50

Step by Step Solution

1. Step 1: Write the proportion equation
   141,800 : 212,700.50 = 212,700.50 : x
2. Step 2: Convert to fraction form
   141,800/212,700.50 = 212,700.50/x
3. Step 3: Cross multiply
   141,800x = 212,700.50 × 212,700.50
4. Step 4: Simplify right side
   141,800x = 45,241,502,700.25
5. Step 5: Solve for x
   x = 45,241,502,700.25/141,800
6. Step 6: Final answer
   x = 319,051.50