Finding the Fourth Proportional to 8,019.89, 11,061.42 and 7,112.45

Step by Step Solution

1. Step 1: Write the proportion equation
   8,019.89 : 11,061.42 = 7,112.45 : x
2. Step 2: Convert to fraction form
   8,019.89/11,061.42 = 7,112.45/x
3. Step 3: Cross multiply
   8,019.89x = 11,061.42 × 7,112.45
4. Step 4: Simplify right side
   8,019.89x = 78,673,824.33
5. Step 5: Solve for x
   x = 78,673,824.33/8,019.89
6. Step 6: Final answer
   x = 9,809.84