Finding the Third Proportional to 138,300.75 and 206,566.88

Step by Step Solution

1. Step 1: Write the proportion equation
   138,300.75 : 206,566.88 = 206,566.88 : x
2. Step 2: Convert to fraction form
   138,300.75/206,566.88 = 206,566.88/x
3. Step 3: Cross multiply
   138,300.75x = 206,566.88 × 206,566.88
4. Step 4: Simplify right side
   138,300.75x = 42,669,873,847.27
5. Step 5: Solve for x
   x = 42,669,873,847.27/138,300.75
6. Step 6: Final answer
   x = 308,529.59