Finding the Fourth Proportional to 13,889.32, 19,167.24 and 7,839.16

Step by Step Solution

1. Step 1: Write the proportion equation
   13,889.32 : 19,167.24 = 7,839.16 : x
2. Step 2: Convert to fraction form
   13,889.32/19,167.24 = 7,839.16/x
3. Step 3: Cross multiply
   13,889.32x = 19,167.24 × 7,839.16
4. Step 4: Simplify right side
   13,889.32x = 150,255,061.12
5. Step 5: Solve for x
   x = 150,255,061.12/13,889.32
6. Step 6: Final answer
   x = 10,818.03