Finding the Third Proportional to 402,393 and 603,637.50

Step by Step Solution

1. Step 1: Write the proportion equation
   402,393 : 603,637.50 = 603,637.50 : x
2. Step 2: Convert to fraction form
   402,393/603,637.50 = 603,637.50/x
3. Step 3: Cross multiply
   402,393x = 603,637.50 × 603,637.50
4. Step 4: Simplify right side
   402,393x = 364,378,231,406.25
5. Step 5: Solve for x
   x = 364,378,231,406.25/402,393
6. Step 6: Final answer
   x = 905,528.26