Finding the Fourth Proportional to 9,913.23, 13,680.57 and 5,436.94

Step by Step Solution

1. Step 1: Write the proportion equation
   9,913.23 : 13,680.57 = 5,436.94 : x
2. Step 2: Convert to fraction form
   9,913.23/13,680.57 = 5,436.94/x
3. Step 3: Cross multiply
   9,913.23x = 13,680.57 × 5,436.94
4. Step 4: Simplify right side
   9,913.23x = 74,380,404.05
5. Step 5: Solve for x
   x = 74,380,404.05/9,913.23
6. Step 6: Final answer
   x = 7,503.15