Finding the Third Proportional to 64,455 and 138,783.50

Step by Step Solution

1. Step 1: Write the proportion equation
   64,455 : 138,783.50 = 138,783.50 : x
2. Step 2: Convert to fraction form
   64,455/138,783.50 = 138,783.50/x
3. Step 3: Cross multiply
   64,455x = 138,783.50 × 138,783.50
4. Step 4: Simplify right side
   64,455x = 19,260,859,872.25
5. Step 5: Solve for x
   x = 19,260,859,872.25/64,455
6. Step 6: Final answer
   x = 298,826.47