Finding the Fourth Proportional to 13,856.91, 19,115.86 and 9,074.72

Step by Step Solution

1. Step 1: Write the proportion equation
   13,856.91 : 19,115.86 = 9,074.72 : x
2. Step 2: Convert to fraction form
   13,856.91/19,115.86 = 9,074.72/x
3. Step 3: Cross multiply
   13,856.91x = 19,115.86 × 9,074.72
4. Step 4: Simplify right side
   13,856.91x = 173,471,077.06
5. Step 5: Solve for x
   x = 173,471,077.06/13,856.91
6. Step 6: Final answer
   x = 12,518.74