Finding the Fourth Proportional to 13,307.91, 19,963.86 and 3,946.83

Step by Step Solution

1. Step 1: Write the proportion equation
   13,307.91 : 19,963.86 = 3,946.83 : x
2. Step 2: Convert to fraction form
   13,307.91/19,963.86 = 3,946.83/x
3. Step 3: Cross multiply
   13,307.91x = 19,963.86 × 3,946.83
4. Step 4: Simplify right side
   13,307.91x = 78,793,961.56
5. Step 5: Solve for x
   x = 78,793,961.56/13,307.91
6. Step 6: Final answer
   x = 5,920.84