Finding the Fourth Proportional to 9,954.34, 13,737.32 and 5,478.42

Step by Step Solution

1. Step 1: Write the proportion equation
   9,954.34 : 13,737.32 = 5,478.42 : x
2. Step 2: Convert to fraction form
   9,954.34/13,737.32 = 5,478.42/x
3. Step 3: Cross multiply
   9,954.34x = 13,737.32 × 5,478.42
4. Step 4: Simplify right side
   9,954.34x = 75,258,808.63
5. Step 5: Solve for x
   x = 75,258,808.63/9,954.34
6. Step 6: Final answer
   x = 7,560.40