Finding the Fourth Proportional to 19,886.50, 27,443.37 and 11,507.86

Step by Step Solution

1. Step 1: Write the proportion equation
   19,886.50 : 27,443.37 = 11,507.86 : x
2. Step 2: Convert to fraction form
   19,886.50/27,443.37 = 11,507.86/x
3. Step 3: Cross multiply
   19,886.50x = 27,443.37 × 11,507.86
4. Step 4: Simplify right side
   19,886.50x = 315,814,459.89
5. Step 5: Solve for x
   x = 315,814,459.89/19,886.50
6. Step 6: Final answer
   x = 15,880.85