Finding the Fourth Proportional to 13,886.37, 19,162.72 and 7,919.96

Step by Step Solution

1. Step 1: Write the proportion equation
   13,886.37 : 19,162.72 = 7,919.96 : x
2. Step 2: Convert to fraction form
   13,886.37/19,162.72 = 7,919.96/x
3. Step 3: Cross multiply
   13,886.37x = 19,162.72 × 7,919.96
4. Step 4: Simplify right side
   13,886.37x = 151,768,004.00
5. Step 5: Solve for x
   x = 151,768,004.00/13,886.37
6. Step 6: Final answer
   x = 10,929.28