Finding the Third Proportional to 285,552 and 428,382.56

Step by Step Solution

1. Step 1: Write the proportion equation
   285,552 : 428,382.56 = 428,382.56 : x
2. Step 2: Convert to fraction form
   285,552/428,382.56 = 428,382.56/x
3. Step 3: Cross multiply
   285,552x = 428,382.56 × 428,382.56
4. Step 4: Simplify right side
   285,552x = 183,511,619,854.07
5. Step 5: Solve for x
   x = 183,511,619,854.07/285,552
6. Step 6: Final answer
   x = 642,655.70