Finding the Third Proportional to 285,201 and 619,663.50

Step by Step Solution

1. Step 1: Write the proportion equation
   285,201 : 619,663.50 = 619,663.50 : x
2. Step 2: Convert to fraction form
   285,201/619,663.50 = 619,663.50/x
3. Step 3: Cross multiply
   285,201x = 619,663.50 × 619,663.50
4. Step 4: Simplify right side
   285,201x = 383,982,853,232.25
5. Step 5: Solve for x
   x = 383,982,853,232.25/285,201
6. Step 6: Final answer
   x = 1,346,358.72