Finding the Third Proportional to 420,228 and 604,084.50

Step by Step Solution

1. Step 1: Write the proportion equation
   420,228 : 604,084.50 = 604,084.50 : x
2. Step 2: Convert to fraction form
   420,228/604,084.50 = 604,084.50/x
3. Step 3: Cross multiply
   420,228x = 604,084.50 × 604,084.50
4. Step 4: Simplify right side
   420,228x = 364,918,083,140.25
5. Step 5: Solve for x
   x = 364,918,083,140.25/420,228
6. Step 6: Final answer
   x = 868,381.17