Finding the Third Proportional to 228,078 and 328,540.50

Step by Step Solution

1. Step 1: Write the proportion equation
   228,078 : 328,540.50 = 328,540.50 : x
2. Step 2: Convert to fraction form
   228,078/328,540.50 = 328,540.50/x
3. Step 3: Cross multiply
   228,078x = 328,540.50 × 328,540.50
4. Step 4: Simplify right side
   228,078x = 107,938,860,140.25
5. Step 5: Solve for x
   x = 107,938,860,140.25/228,078
6. Step 6: Final answer
   x = 473,254.15