Finding the Third Proportional to 142,930 and 210,115.50

Step by Step Solution

1. Step 1: Write the proportion equation
   142,930 : 210,115.50 = 210,115.50 : x
2. Step 2: Convert to fraction form
   142,930/210,115.50 = 210,115.50/x
3. Step 3: Cross multiply
   142,930x = 210,115.50 × 210,115.50
4. Step 4: Simplify right side
   142,930x = 44,148,523,340.25
5. Step 5: Solve for x
   x = 44,148,523,340.25/142,930
6. Step 6: Final answer
   x = 308,882.13