Finding the Third Proportional to 287,150.06 and 422,432.72

Step by Step Solution

1. Step 1: Write the proportion equation
   287,150.06 : 422,432.72 = 422,432.72 : x
2. Step 2: Convert to fraction form
   287,150.06/422,432.72 = 422,432.72/x
3. Step 3: Cross multiply
   287,150.06x = 422,432.72 × 422,432.72
4. Step 4: Simplify right side
   287,150.06x = 178,449,401,870.52
5. Step 5: Solve for x
   x = 178,449,401,870.52/287,150.06
6. Step 6: Final answer
   x = 621,449.98