Finding the Third Proportional to 448,462.13 and 689,300.72

Step by Step Solution

1. Step 1: Write the proportion equation
   448,462.13 : 689,300.72 = 689,300.72 : x
2. Step 2: Convert to fraction form
   448,462.13/689,300.72 = 689,300.72/x
3. Step 3: Cross multiply
   448,462.13x = 689,300.72 × 689,300.72
4. Step 4: Simplify right side
   448,462.13x = 475,135,480,869.27
5. Step 5: Solve for x
   x = 475,135,480,869.27/448,462.13
6. Step 6: Final answer
   x = 1,059,477.39