Finding the Fourth Proportional to 12,978,357.06, 17,904,723.15 and 7,470,413.97

Step by Step Solution

1. Step 1: Write the proportion equation
   12,978,357.06 : 17,904,723.15 = 7,470,413.97 : x
2. Step 2: Convert to fraction form
   12,978,357.06/17,904,723.15 = 7,470,413.97/x
3. Step 3: Cross multiply
   12,978,357.06x = 17,904,723.15 × 7,470,413.97
4. Step 4: Simplify right side
   12,978,357.06x = 133,755,693,948,742.39
5. Step 5: Solve for x
   x = 133,755,693,948,742.39/12,978,357.06
6. Step 6: Final answer
   x = 10,306,057.49