Finding the Fourth Proportional to 10,085.54, 13,918.50 and 5,609.72

Step by Step Solution

1. Step 1: Write the proportion equation
   10,085.54 : 13,918.50 = 5,609.72 : x
2. Step 2: Convert to fraction form
   10,085.54/13,918.50 = 5,609.72/x
3. Step 3: Cross multiply
   10,085.54x = 13,918.50 × 5,609.72
4. Step 4: Simplify right side
   10,085.54x = 78,078,887.82
5. Step 5: Solve for x
   x = 78,078,887.82/10,085.54
6. Step 6: Final answer
   x = 7,741.67