Finding the Fourth Proportional to 10,019.82, 13,814.79 and 6,428.45

Step by Step Solution

1. Step 1: Write the proportion equation
   10,019.82 : 13,814.79 = 6,428.45 : x
2. Step 2: Convert to fraction form
   10,019.82/13,814.79 = 6,428.45/x
3. Step 3: Cross multiply
   10,019.82x = 13,814.79 × 6,428.45
4. Step 4: Simplify right side
   10,019.82x = 88,807,686.78
5. Step 5: Solve for x
   x = 88,807,686.78/10,019.82
6. Step 6: Final answer
   x = 8,863.20