Finding the Fourth Proportional to 9,727.88, 13,424.24 and 5,420.94

Step by Step Solution

1. Step 1: Write the proportion equation
   9,727.88 : 13,424.24 = 5,420.94 : x
2. Step 2: Convert to fraction form
   9,727.88/13,424.24 = 5,420.94/x
3. Step 3: Cross multiply
   9,727.88x = 13,424.24 × 5,420.94
4. Step 4: Simplify right side
   9,727.88x = 72,771,999.59
5. Step 5: Solve for x
   x = 72,771,999.59/9,727.88
6. Step 6: Final answer
   x = 7,480.77