Finding the Fourth Proportional to 13,820.54, 19,072.86 and 7,853.22

Step by Step Solution

1. Step 1: Write the proportion equation
   13,820.54 : 19,072.86 = 7,853.22 : x
2. Step 2: Convert to fraction form
   13,820.54/19,072.86 = 7,853.22/x
3. Step 3: Cross multiply
   13,820.54x = 19,072.86 × 7,853.22
4. Step 4: Simplify right side
   13,820.54x = 149,783,365.61
5. Step 5: Solve for x
   x = 149,783,365.61/13,820.54
6. Step 6: Final answer
   x = 10,837.74