Finding the Fourth Proportional to 12,846,856, 17,728,661.28 and 7,123,720

Step by Step Solution

1. Step 1: Write the proportion equation
   12,846,856 : 17,728,661.28 = 7,123,720 : x
2. Step 2: Convert to fraction form
   12,846,856/17,728,661.28 = 7,123,720/x
3. Step 3: Cross multiply
   12,846,856x = 17,728,661.28 × 7,123,720
4. Step 4: Simplify right side
   12,846,856x = 126,294,018,933,561.61
5. Step 5: Solve for x
   x = 126,294,018,933,561.61/12,846,856
6. Step 6: Final answer
   x = 9,830,733.60