Finding the Fourth Proportional to 9,719.55, 13,419.43 and 7,477.47

Step by Step Solution

1. Step 1: Write the proportion equation
   9,719.55 : 13,419.43 = 7,477.47 : x
2. Step 2: Convert to fraction form
   9,719.55/13,419.43 = 7,477.47/x
3. Step 3: Cross multiply
   9,719.55x = 13,419.43 × 7,477.47
4. Step 4: Simplify right side
   9,719.55x = 100,343,361.04
5. Step 5: Solve for x
   x = 100,343,361.04/9,719.55
6. Step 6: Final answer
   x = 10,323.87