Finding the Fourth Proportional to 10,085.45, 13,917.57 and 5,609.11

Step by Step Solution

1. Step 1: Write the proportion equation
   10,085.45 : 13,917.57 = 5,609.11 : x
2. Step 2: Convert to fraction form
   10,085.45/13,917.57 = 5,609.11/x
3. Step 3: Cross multiply
   10,085.45x = 13,917.57 × 5,609.11
4. Step 4: Simplify right side
   10,085.45x = 78,065,181.06
5. Step 5: Solve for x
   x = 78,065,181.06/10,085.45
6. Step 6: Final answer
   x = 7,740.38