Finding the Third Proportional to 146,128.50 and 228,420

Step by Step Solution

1. Step 1: Write the proportion equation
   146,128.50 : 228,420 = 228,420 : x
2. Step 2: Convert to fraction form
   146,128.50/228,420 = 228,420/x
3. Step 3: Cross multiply
   146,128.50x = 228,420 × 228,420
4. Step 4: Simplify right side
   146,128.50x = 52,175,696,400
5. Step 5: Solve for x
   x = 52,175,696,400/146,128.50
6. Step 6: Final answer
   x = 357,053.53