Finding the Fourth Proportional to 13,851.61, 19,112.56 and 7,881.71

Step by Step Solution

1. Step 1: Write the proportion equation
   13,851.61 : 19,112.56 = 7,881.71 : x
2. Step 2: Convert to fraction form
   13,851.61/19,112.56 = 7,881.71/x
3. Step 3: Cross multiply
   13,851.61x = 19,112.56 × 7,881.71
4. Step 4: Simplify right side
   13,851.61x = 150,639,540.01
5. Step 5: Solve for x
   x = 150,639,540.01/13,851.61
6. Step 6: Final answer
   x = 10,875.24