Finding the Fourth Proportional to 13,898.17, 19,179.72 and 9,926.05

Step by Step Solution

1. Step 1: Write the proportion equation
   13,898.17 : 19,179.72 = 9,926.05 : x
2. Step 2: Convert to fraction form
   13,898.17/19,179.72 = 9,926.05/x
3. Step 3: Cross multiply
   13,898.17x = 19,179.72 × 9,926.05
4. Step 4: Simplify right side
   13,898.17x = 190,378,859.71
5. Step 5: Solve for x
   x = 190,378,859.71/13,898.17
6. Step 6: Final answer
   x = 13,698.12