Finding the Fourth Proportional to 13,142.00, 18,136.37 and 7,477.57

Step by Step Solution

1. Step 1: Write the proportion equation
   13,142.00 : 18,136.37 = 7,477.57 : x
2. Step 2: Convert to fraction form
   13,142.00/18,136.37 = 7,477.57/x
3. Step 3: Cross multiply
   13,142.00x = 18,136.37 × 7,477.57
4. Step 4: Simplify right side
   13,142.00x = 135,616,017.59
5. Step 5: Solve for x
   x = 135,616,017.59/13,142.00
6. Step 6: Final answer
   x = 10,319.28