Finding the Fourth Proportional to 13,105.87, 19,656.04 and 4,221.98

Step by Step Solution

1. Step 1: Write the proportion equation
   13,105.87 : 19,656.04 = 4,221.98 : x
2. Step 2: Convert to fraction form
   13,105.87/19,656.04 = 4,221.98/x
3. Step 3: Cross multiply
   13,105.87x = 19,656.04 × 4,221.98
4. Step 4: Simplify right side
   13,105.87x = 82,987,386.65
5. Step 5: Solve for x
   x = 82,987,386.65/13,105.87
6. Step 6: Final answer
   x = 6,332.08