Finding the Fourth Proportional to 10,128,568.05, 13,978,754.46 and 5,776,656.75

Step by Step Solution

1. Step 1: Write the proportion equation
   10,128,568.05 : 13,978,754.46 = 5,776,656.75 : x
2. Step 2: Convert to fraction form
   10,128,568.05/13,978,754.46 = 5,776,656.75/x
3. Step 3: Cross multiply
   10,128,568.05x = 13,978,754.46 × 5,776,656.75
4. Step 4: Simplify right side
   10,128,568.05x = 80,750,466,307,951.61
5. Step 5: Solve for x
   x = 80,750,466,307,951.61/10,128,568.05
6. Step 6: Final answer
   x = 7,972,545.17