Finding the Third Proportional to 192,310 and 420,813.50

Step by Step Solution

1. Step 1: Write the proportion equation
   192,310 : 420,813.50 = 420,813.50 : x
2. Step 2: Convert to fraction form
   192,310/420,813.50 = 420,813.50/x
3. Step 3: Cross multiply
   192,310x = 420,813.50 × 420,813.50
4. Step 4: Simplify right side
   192,310x = 177,084,001,782.25
5. Step 5: Solve for x
   x = 177,084,001,782.25/192,310
6. Step 6: Final answer
   x = 920,825.76