Finding the Third Proportional to 281,899 and 386,560.50

Step by Step Solution

1. Step 1: Write the proportion equation
   281,899 : 386,560.50 = 386,560.50 : x
2. Step 2: Convert to fraction form
   281,899/386,560.50 = 386,560.50/x
3. Step 3: Cross multiply
   281,899x = 386,560.50 × 386,560.50
4. Step 4: Simplify right side
   281,899x = 149,429,020,160.25
5. Step 5: Solve for x
   x = 149,429,020,160.25/281,899
6. Step 6: Final answer
   x = 530,079.99