Finding the Third Proportional to 450,145 and 712,801.50

Step by Step Solution

1. Step 1: Write the proportion equation
   450,145 : 712,801.50 = 712,801.50 : x
2. Step 2: Convert to fraction form
   450,145/712,801.50 = 712,801.50/x
3. Step 3: Cross multiply
   450,145x = 712,801.50 × 712,801.50
4. Step 4: Simplify right side
   450,145x = 508,085,978,402.25
5. Step 5: Solve for x
   x = 508,085,978,402.25/450,145
6. Step 6: Final answer
   x = 1,128,716.25