Finding the Fourth Proportional to 9,994.71, 13,792.75 and 5,518.47

Step by Step Solution

1. Step 1: Write the proportion equation
   9,994.71 : 13,792.75 = 5,518.47 : x
2. Step 2: Convert to fraction form
   9,994.71/13,792.75 = 5,518.47/x
3. Step 3: Cross multiply
   9,994.71x = 13,792.75 × 5,518.47
4. Step 4: Simplify right side
   9,994.71x = 76,114,877.09
5. Step 5: Solve for x
   x = 76,114,877.09/9,994.71
6. Step 6: Final answer
   x = 7,615.52