Finding the Third Proportional to 357,183 and 486,415.50

Step by Step Solution

1. Step 1: Write the proportion equation
   357,183 : 486,415.50 = 486,415.50 : x
2. Step 2: Convert to fraction form
   357,183/486,415.50 = 486,415.50/x
3. Step 3: Cross multiply
   357,183x = 486,415.50 × 486,415.50
4. Step 4: Simplify right side
   357,183x = 236,600,038,640.25
5. Step 5: Solve for x
   x = 236,600,038,640.25/357,183
6. Step 6: Final answer
   x = 662,405.65