Finding the Fourth Proportional to 12,978,351.81, 17,904,715.92 and 7,470,408.71

Step by Step Solution

1. Step 1: Write the proportion equation
   12,978,351.81 : 17,904,715.92 = 7,470,408.71 : x
2. Step 2: Convert to fraction form
   12,978,351.81/17,904,715.92 = 7,470,408.71/x
3. Step 3: Cross multiply
   12,978,351.81x = 17,904,715.92 × 7,470,408.71
4. Step 4: Simplify right side
   12,978,351.81x = 133,755,545,803,605.47
5. Step 5: Solve for x
   x = 133,755,545,803,605.47/12,978,351.81
6. Step 6: Final answer
   x = 10,306,050.24