Finding the Third Proportional to 190,485 and 418,567.50

Step by Step Solution

1. Step 1: Write the proportion equation
   190,485 : 418,567.50 = 418,567.50 : x
2. Step 2: Convert to fraction form
   190,485/418,567.50 = 418,567.50/x
3. Step 3: Cross multiply
   190,485x = 418,567.50 × 418,567.50
4. Step 4: Simplify right side
   190,485x = 175,198,752,056.25
5. Step 5: Solve for x
   x = 175,198,752,056.25/190,485
6. Step 6: Final answer
   x = 919,750.91