Finding the Fourth Proportional to 11,412.30, 15,736.89 and 8,889.96

Step by Step Solution

1. Step 1: Write the proportion equation
   11,412.30 : 15,736.89 = 8,889.96 : x
2. Step 2: Convert to fraction form
   11,412.30/15,736.89 = 8,889.96/x
3. Step 3: Cross multiply
   11,412.30x = 15,736.89 × 8,889.96
4. Step 4: Simplify right side
   11,412.30x = 139,900,322.62
5. Step 5: Solve for x
   x = 139,900,322.62/11,412.30
6. Step 6: Final answer
   x = 12,258.73