Finding the Third Proportional to 456,703.31 and 638,499.38

Step by Step Solution

1. Step 1: Write the proportion equation
   456,703.31 : 638,499.38 = 638,499.38 : x
2. Step 2: Convert to fraction form
   456,703.31/638,499.38 = 638,499.38/x
3. Step 3: Cross multiply
   456,703.31x = 638,499.38 × 638,499.38
4. Step 4: Simplify right side
   456,703.31x = 407,681,451,875.39
5. Step 5: Solve for x
   x = 407,681,451,875.39/456,703.31
6. Step 6: Final answer
   x = 892,661.47