Finding the Fourth Proportional to 13,891.32, 19,171.59 and 7,924.47

Step by Step Solution

1. Step 1: Write the proportion equation
   13,891.32 : 19,171.59 = 7,924.47 : x
2. Step 2: Convert to fraction form
   13,891.32/19,171.59 = 7,924.47/x
3. Step 3: Cross multiply
   13,891.32x = 19,171.59 × 7,924.47
4. Step 4: Simplify right side
   13,891.32x = 151,924,689.81
5. Step 5: Solve for x
   x = 151,924,689.81/13,891.32
6. Step 6: Final answer
   x = 10,936.66