Finding the Fourth Proportional to 13,081.60, 19,630.52 and 5,290.48

Step by Step Solution

1. Step 1: Write the proportion equation
   13,081.60 : 19,630.52 = 5,290.48 : x
2. Step 2: Convert to fraction form
   13,081.60/19,630.52 = 5,290.48/x
3. Step 3: Cross multiply
   13,081.60x = 19,630.52 × 5,290.48
4. Step 4: Simplify right side
   13,081.60x = 103,854,873.45
5. Step 5: Solve for x
   x = 103,854,873.45/13,081.60
6. Step 6: Final answer
   x = 7,939.00