Finding the Third Proportional to 222,902.50 and 434,643

Step by Step Solution

1. Step 1: Write the proportion equation
   222,902.50 : 434,643 = 434,643 : x
2. Step 2: Convert to fraction form
   222,902.50/434,643 = 434,643/x
3. Step 3: Cross multiply
   222,902.50x = 434,643 × 434,643
4. Step 4: Simplify right side
   222,902.50x = 188,914,537,449
5. Step 5: Solve for x
   x = 188,914,537,449/222,902.50
6. Step 6: Final answer
   x = 847,520.95