Finding the Third Proportional to 420,273 and 634,783.50

Step by Step Solution

1. Step 1: Write the proportion equation
   420,273 : 634,783.50 = 634,783.50 : x
2. Step 2: Convert to fraction form
   420,273/634,783.50 = 634,783.50/x
3. Step 3: Cross multiply
   420,273x = 634,783.50 × 634,783.50
4. Step 4: Simplify right side
   420,273x = 402,950,091,872.25
5. Step 5: Solve for x
   x = 402,950,091,872.25/420,273
6. Step 6: Final answer
   x = 958,781.77