Finding the Fourth Proportional to 10,111.17, 15,221.34 and 9,093.95

Step by Step Solution

1. Step 1: Write the proportion equation
   10,111.17 : 15,221.34 = 9,093.95 : x
2. Step 2: Convert to fraction form
   10,111.17/15,221.34 = 9,093.95/x
3. Step 3: Cross multiply
   10,111.17x = 15,221.34 × 9,093.95
4. Step 4: Simplify right side
   10,111.17x = 138,422,104.89
5. Step 5: Solve for x
   x = 138,422,104.89/10,111.17
6. Step 6: Final answer
   x = 13,690.02