Finding the Fourth Proportional to 13,105.68, 19,656.60 and 3,870.48

Step by Step Solution

1. Step 1: Write the proportion equation
   13,105.68 : 19,656.60 = 3,870.48 : x
2. Step 2: Convert to fraction form
   13,105.68/19,656.60 = 3,870.48/x
3. Step 3: Cross multiply
   13,105.68x = 19,656.60 × 3,870.48
4. Step 4: Simplify right side
   13,105.68x = 76,080,477.17
5. Step 5: Solve for x
   x = 76,080,477.17/13,105.68
6. Step 6: Final answer
   x = 5,805.15