Finding the Fourth Proportional to 10,091.90, 13,926.78 and 5,616.08

Step by Step Solution

1. Step 1: Write the proportion equation
   10,091.90 : 13,926.78 = 5,616.08 : x
2. Step 2: Convert to fraction form
   10,091.90/13,926.78 = 5,616.08/x
3. Step 3: Cross multiply
   10,091.90x = 13,926.78 × 5,616.08
4. Step 4: Simplify right side
   10,091.90x = 78,213,910.62
5. Step 5: Solve for x
   x = 78,213,910.62/10,091.90
6. Step 6: Final answer
   x = 7,750.17