Finding the Fourth Proportional to 7,728,638.89, 10,665,105.35 and 4,290,658.49

Step by Step Solution

1. Step 1: Write the proportion equation
   7,728,638.89 : 10,665,105.35 = 4,290,658.49 : x
2. Step 2: Convert to fraction form
   7,728,638.89/10,665,105.35 = 4,290,658.49/x
3. Step 3: Cross multiply
   7,728,638.89x = 10,665,105.35 × 4,290,658.49
4. Step 4: Simplify right side
   7,728,638.89x = 45,760,324,741,943.11
5. Step 5: Solve for x
   x = 45,760,324,741,943.11/7,728,638.89
6. Step 6: Final answer
   x = 5,920,877.58