Finding the Fourth Proportional to 13,100.60, 19,659 and 5,309.48

Step by Step Solution

1. Step 1: Write the proportion equation
   13,100.60 : 19,659 = 5,309.48 : x
2. Step 2: Convert to fraction form
   13,100.60/19,659 = 5,309.48/x
3. Step 3: Cross multiply
   13,100.60x = 19,659 × 5,309.48
4. Step 4: Simplify right side
   13,100.60x = 104,379,067.32
5. Step 5: Solve for x
   x = 104,379,067.32/13,100.60
6. Step 6: Final answer
   x = 7,967.50