Finding the Fourth Proportional to 9,954.23, 13,736.83 and 5,478.13

Step by Step Solution

1. Step 1: Write the proportion equation
   9,954.23 : 13,736.83 = 5,478.13 : x
2. Step 2: Convert to fraction form
   9,954.23/13,736.83 = 5,478.13/x
3. Step 3: Cross multiply
   9,954.23x = 13,736.83 × 5,478.13
4. Step 4: Simplify right side
   9,954.23x = 75,252,146.57
5. Step 5: Solve for x
   x = 75,252,146.57/9,954.23
6. Step 6: Final answer
   x = 7,559.82