Finding the Third Proportional to 138,426.75 and 300,865.50

Step by Step Solution

1. Step 1: Write the proportion equation
   138,426.75 : 300,865.50 = 300,865.50 : x
2. Step 2: Convert to fraction form
   138,426.75/300,865.50 = 300,865.50/x
3. Step 3: Cross multiply
   138,426.75x = 300,865.50 × 300,865.50
4. Step 4: Simplify right side
   138,426.75x = 90,520,049,090.25
5. Step 5: Solve for x
   x = 90,520,049,090.25/138,426.75
6. Step 6: Final answer
   x = 653,920.21