Finding the Third Proportional to 279,875.25 and 603,490.50

Step by Step Solution

1. Step 1: Write the proportion equation
   279,875.25 : 603,490.50 = 603,490.50 : x
2. Step 2: Convert to fraction form
   279,875.25/603,490.50 = 603,490.50/x
3. Step 3: Cross multiply
   279,875.25x = 603,490.50 × 603,490.50
4. Step 4: Simplify right side
   279,875.25x = 364,200,783,590.25
5. Step 5: Solve for x
   x = 364,200,783,590.25/279,875.25
6. Step 6: Final answer
   x = 1,301,296.86