Finding the Third Proportional to 305,134.50 and 638,152.50

Step by Step Solution

1. Step 1: Write the proportion equation
   305,134.50 : 638,152.50 = 638,152.50 : x
2. Step 2: Convert to fraction form
   305,134.50/638,152.50 = 638,152.50/x
3. Step 3: Cross multiply
   305,134.50x = 638,152.50 × 638,152.50
4. Step 4: Simplify right side
   305,134.50x = 407,238,613,256.25
5. Step 5: Solve for x
   x = 407,238,613,256.25/305,134.50
6. Step 6: Final answer
   x = 1,334,620.02