Finding the Fourth Proportional to 9,954.18, 13,736.77 and 5,478.25

Step by Step Solution

1. Step 1: Write the proportion equation
   9,954.18 : 13,736.77 = 5,478.25 : x
2. Step 2: Convert to fraction form
   9,954.18/13,736.77 = 5,478.25/x
3. Step 3: Cross multiply
   9,954.18x = 13,736.77 × 5,478.25
4. Step 4: Simplify right side
   9,954.18x = 75,253,460.25
5. Step 5: Solve for x
   x = 75,253,460.25/9,954.18
6. Step 6: Final answer
   x = 7,559.99