Finding the Fourth Proportional to 35,419.27, 53,142.41 and 13,242.55

Step by Step Solution

1. Step 1: Write the proportion equation
   35,419.27 : 53,142.41 = 13,242.55 : x
2. Step 2: Convert to fraction form
   35,419.27/53,142.41 = 13,242.55/x
3. Step 3: Cross multiply
   35,419.27x = 53,142.41 × 13,242.55
4. Step 4: Simplify right side
   35,419.27x = 703,741,021.55
5. Step 5: Solve for x
   x = 703,741,021.55/35,419.27
6. Step 6: Final answer
   x = 19,868.87