Finding the Third Proportional to 415,260 and 545,251.50

Step by Step Solution

1. Step 1: Write the proportion equation
   415,260 : 545,251.50 = 545,251.50 : x
2. Step 2: Convert to fraction form
   415,260/545,251.50 = 545,251.50/x
3. Step 3: Cross multiply
   415,260x = 545,251.50 × 545,251.50
4. Step 4: Simplify right side
   415,260x = 297,299,198,252.25
5. Step 5: Solve for x
   x = 297,299,198,252.25/415,260
6. Step 6: Final answer
   x = 715,935.07