Finding the Fourth Proportional to 13,116.21, 19,684.68 and 5,725.86

Step by Step Solution

1. Step 1: Write the proportion equation
   13,116.21 : 19,684.68 = 5,725.86 : x
2. Step 2: Convert to fraction form
   13,116.21/19,684.68 = 5,725.86/x
3. Step 3: Cross multiply
   13,116.21x = 19,684.68 × 5,725.86
4. Step 4: Simplify right side
   13,116.21x = 112,711,721.82
5. Step 5: Solve for x
   x = 112,711,721.82/13,116.21
6. Step 6: Final answer
   x = 8,593.31