Finding the Third Proportional to 583,200 and 1,276,128

Step by Step Solution

1. Step 1: Write the proportion equation
   583,200 : 1,276,128 = 1,276,128 : x
2. Step 2: Convert to fraction form
   583,200/1,276,128 = 1,276,128/x
3. Step 3: Cross multiply
   583,200x = 1,276,128 × 1,276,128
4. Step 4: Simplify right side
   583,200x = 1,628,502,672,384
5. Step 5: Solve for x
   x = 1,628,502,672,384/583,200
6. Step 6: Final answer
   x = 2,792,357.12