Finding the Fourth Proportional to 10,091.66, 13,926.42 and 5,615.15

Step by Step Solution

1. Step 1: Write the proportion equation
   10,091.66 : 13,926.42 = 5,615.15 : x
2. Step 2: Convert to fraction form
   10,091.66/13,926.42 = 5,615.15/x
3. Step 3: Cross multiply
   10,091.66x = 13,926.42 × 5,615.15
4. Step 4: Simplify right side
   10,091.66x = 78,198,867.63
5. Step 5: Solve for x
   x = 78,198,867.63/10,091.66
6. Step 6: Final answer
   x = 7,748.86