Finding the Fourth Proportional to 13,889.12, 19,166.52 and 7,922.72

Step by Step Solution

1. Step 1: Write the proportion equation
   13,889.12 : 19,166.52 = 7,922.72 : x
2. Step 2: Convert to fraction form
   13,889.12/19,166.52 = 7,922.72/x
3. Step 3: Cross multiply
   13,889.12x = 19,166.52 × 7,922.72
4. Step 4: Simplify right side
   13,889.12x = 151,850,971.33
5. Step 5: Solve for x
   x = 151,850,971.33/13,889.12
6. Step 6: Final answer
   x = 10,933.09