Finding the Third Proportional to 287,620.50 and 627,153

Step by Step Solution

1. Step 1: Write the proportion equation
   287,620.50 : 627,153 = 627,153 : x
2. Step 2: Convert to fraction form
   287,620.50/627,153 = 627,153/x
3. Step 3: Cross multiply
   287,620.50x = 627,153 × 627,153
4. Step 4: Simplify right side
   287,620.50x = 393,320,885,409
5. Step 5: Solve for x
   x = 393,320,885,409/287,620.50
6. Step 6: Final answer
   x = 1,367,499.48