Finding the Third Proportional to 142,582.50 and 199,339.50

Step by Step Solution

1. Step 1: Write the proportion equation
   142,582.50 : 199,339.50 = 199,339.50 : x
2. Step 2: Convert to fraction form
   142,582.50/199,339.50 = 199,339.50/x
3. Step 3: Cross multiply
   142,582.50x = 199,339.50 × 199,339.50
4. Step 4: Simplify right side
   142,582.50x = 39,736,236,260.25
5. Step 5: Solve for x
   x = 39,736,236,260.25/142,582.50
6. Step 6: Final answer
   x = 278,689.43