Finding the Fourth Proportional to 13,111.92, 19,659.96 and 5,215.46

Step by Step Solution

1. Step 1: Write the proportion equation
   13,111.92 : 19,659.96 = 5,215.46 : x
2. Step 2: Convert to fraction form
   13,111.92/19,659.96 = 5,215.46/x
3. Step 3: Cross multiply
   13,111.92x = 19,659.96 × 5,215.46
4. Step 4: Simplify right side
   13,111.92x = 102,535,636.68
5. Step 5: Solve for x
   x = 102,535,636.68/13,111.92
6. Step 6: Final answer
   x = 7,820.03