Finding the Fourth Proportional to 9,995.19, 13,792.71 and 5,518.90

Step by Step Solution

1. Step 1: Write the proportion equation
   9,995.19 : 13,792.71 = 5,518.90 : x
2. Step 2: Convert to fraction form
   9,995.19/13,792.71 = 5,518.90/x
3. Step 3: Cross multiply
   9,995.19x = 13,792.71 × 5,518.90
4. Step 4: Simplify right side
   9,995.19x = 76,120,587.22
5. Step 5: Solve for x
   x = 76,120,587.22/9,995.19
6. Step 6: Final answer
   x = 7,615.72