Finding the Fourth Proportional to 9,896.05, 13,656.76 and 5,419.99

Step by Step Solution

1. Step 1: Write the proportion equation
   9,896.05 : 13,656.76 = 5,419.99 : x
2. Step 2: Convert to fraction form
   9,896.05/13,656.76 = 5,419.99/x
3. Step 3: Cross multiply
   9,896.05x = 13,656.76 × 5,419.99
4. Step 4: Simplify right side
   9,896.05x = 74,019,454.94
5. Step 5: Solve for x
   x = 74,019,454.94/9,896.05
6. Step 6: Final answer
   x = 7,479.70