Finding the Third Proportional to 64,589.06 and 138,520.69

Step by Step Solution

1. Step 1: Write the proportion equation
   64,589.06 : 138,520.69 = 138,520.69 : x
2. Step 2: Convert to fraction form
   64,589.06/138,520.69 = 138,520.69/x
3. Step 3: Cross multiply
   64,589.06x = 138,520.69 × 138,520.69
4. Step 4: Simplify right side
   64,589.06x = 19,187,980,865.47
5. Step 5: Solve for x
   x = 19,187,980,865.47/64,589.06
6. Step 6: Final answer
   x = 297,077.87