Finding the Fourth Proportional to 9,954.09, 13,736.52 and 5,478.03

Step by Step Solution

1. Step 1: Write the proportion equation
   9,954.09 : 13,736.52 = 5,478.03 : x
2. Step 2: Convert to fraction form
   9,954.09/13,736.52 = 5,478.03/x
3. Step 3: Cross multiply
   9,954.09x = 13,736.52 × 5,478.03
4. Step 4: Simplify right side
   9,954.09x = 75,249,068.66
5. Step 5: Solve for x
   x = 75,249,068.66/9,954.09
6. Step 6: Final answer
   x = 7,559.61