Finding the Fourth Proportional to 12,856.32, 17,737.92 and 7,888.32

Step by Step Solution

1. Step 1: Write the proportion equation
   12,856.32 : 17,737.92 = 7,888.32 : x
2. Step 2: Convert to fraction form
   12,856.32/17,737.92 = 7,888.32/x
3. Step 3: Cross multiply
   12,856.32x = 17,737.92 × 7,888.32
4. Step 4: Simplify right side
   12,856.32x = 139,922,389.09
5. Step 5: Solve for x
   x = 139,922,389.09/12,856.32
6. Step 6: Final answer
   x = 10,883.55