Finding the Fourth Proportional to 13,308.32, 19,959.07 and 3,946.15

Step by Step Solution

1. Step 1: Write the proportion equation
   13,308.32 : 19,959.07 = 3,946.15 : x
2. Step 2: Convert to fraction form
   13,308.32/19,959.07 = 3,946.15/x
3. Step 3: Cross multiply
   13,308.32x = 19,959.07 × 3,946.15
4. Step 4: Simplify right side
   13,308.32x = 78,761,484.08
5. Step 5: Solve for x
   x = 78,761,484.08/13,308.32
6. Step 6: Final answer
   x = 5,918.21