Finding the Third Proportional to 1,137,580 and 2,415,128

Step by Step Solution

1. Step 1: Write the proportion equation
   1,137,580 : 2,415,128 = 2,415,128 : x
2. Step 2: Convert to fraction form
   1,137,580/2,415,128 = 2,415,128/x
3. Step 3: Cross multiply
   1,137,580x = 2,415,128 × 2,415,128
4. Step 4: Simplify right side
   1,137,580x = 5,832,843,256,384
5. Step 5: Solve for x
   x = 5,832,843,256,384/1,137,580
6. Step 6: Final answer
   x = 5,127,413.68