Finding the Third Proportional to 615,205 and 963,128.50

Step by Step Solution

1. Step 1: Write the proportion equation
   615,205 : 963,128.50 = 963,128.50 : x
2. Step 2: Convert to fraction form
   615,205/963,128.50 = 963,128.50/x
3. Step 3: Cross multiply
   615,205x = 963,128.50 × 963,128.50
4. Step 4: Simplify right side
   615,205x = 927,616,507,512.25
5. Step 5: Solve for x
   x = 927,616,507,512.25/615,205
6. Step 6: Final answer
   x = 1,507,816.92