Finding the Fourth Proportional to 11,888.83, 16,409.18 and 7,856.34

Step by Step Solution

1. Step 1: Write the proportion equation
   11,888.83 : 16,409.18 = 7,856.34 : x
2. Step 2: Convert to fraction form
   11,888.83/16,409.18 = 7,856.34/x
3. Step 3: Cross multiply
   11,888.83x = 16,409.18 × 7,856.34
4. Step 4: Simplify right side
   11,888.83x = 128,916,147.61
5. Step 5: Solve for x
   x = 128,916,147.61/11,888.83
6. Step 6: Final answer
   x = 10,843.47