Finding the Third Proportional to 420,600 and 635,916.75

Step by Step Solution

1. Step 1: Write the proportion equation
   420,600 : 635,916.75 = 635,916.75 : x
2. Step 2: Convert to fraction form
   420,600/635,916.75 = 635,916.75/x
3. Step 3: Cross multiply
   420,600x = 635,916.75 × 635,916.75
4. Step 4: Simplify right side
   420,600x = 404,390,112,930.56
5. Step 5: Solve for x
   x = 404,390,112,930.56/420,600
6. Step 6: Final answer
   x = 961,460.09