Finding the Third Proportional to 131,421 and 205,888.50

Step by Step Solution

1. Step 1: Write the proportion equation
   131,421 : 205,888.50 = 205,888.50 : x
2. Step 2: Convert to fraction form
   131,421/205,888.50 = 205,888.50/x
3. Step 3: Cross multiply
   131,421x = 205,888.50 × 205,888.50
4. Step 4: Simplify right side
   131,421x = 42,390,074,432.25
5. Step 5: Solve for x
   x = 42,390,074,432.25/131,421
6. Step 6: Final answer
   x = 322,551.76