Finding the Fourth Proportional to 9,141.76, 13,645.76 and 7,851.52

Step by Step Solution

1. Step 1: Write the proportion equation
   9,141.76 : 13,645.76 = 7,851.52 : x
2. Step 2: Convert to fraction form
   9,141.76/13,645.76 = 7,851.52/x
3. Step 3: Cross multiply
   9,141.76x = 13,645.76 × 7,851.52
4. Step 4: Simplify right side
   9,141.76x = 107,139,957.56
5. Step 5: Solve for x
   x = 107,139,957.56/9,141.76
6. Step 6: Final answer
   x = 11,719.84