Finding the Fourth Proportional to 13,380.03, 20,059.08 and 5,055.31

Step by Step Solution

1. Step 1: Write the proportion equation
   13,380.03 : 20,059.08 = 5,055.31 : x
2. Step 2: Convert to fraction form
   13,380.03/20,059.08 = 5,055.31/x
3. Step 3: Cross multiply
   13,380.03x = 20,059.08 × 5,055.31
4. Step 4: Simplify right side
   13,380.03x = 101,404,867.71
5. Step 5: Solve for x
   x = 101,404,867.71/13,380.03
6. Step 6: Final answer
   x = 7,578.82