Finding the Fourth Proportional to 10,128,560.15, 13,978,743.58 and 5,776,648.85

Step by Step Solution

1. Step 1: Write the proportion equation
   10,128,560.15 : 13,978,743.58 = 5,776,648.85 : x
2. Step 2: Convert to fraction form
   10,128,560.15/13,978,743.58 = 5,776,648.85/x
3. Step 3: Cross multiply
   10,128,560.15x = 13,978,743.58 × 5,776,648.85
4. Step 4: Simplify right side
   10,128,560.15x = 80,750,293,068,019.56
5. Step 5: Solve for x
   x = 80,750,293,068,019.56/10,128,560.15
6. Step 6: Final answer
   x = 7,972,534.28