Finding the Fourth Proportional to 10,019.86, 15,015.42 and 5,628.07

Step by Step Solution

1. Step 1: Write the proportion equation
   10,019.86 : 15,015.42 = 5,628.07 : x
2. Step 2: Convert to fraction form
   10,019.86/15,015.42 = 5,628.07/x
3. Step 3: Cross multiply
   10,019.86x = 15,015.42 × 5,628.07
4. Step 4: Simplify right side
   10,019.86x = 84,507,834.84
5. Step 5: Solve for x
   x = 84,507,834.84/10,019.86
6. Step 6: Final answer
   x = 8,434.03