Finding the Fourth Proportional to 12,720.83, 19,085.27 and 5,706.86

Step by Step Solution

1. Step 1: Write the proportion equation
   12,720.83 : 19,085.27 = 5,706.86 : x
2. Step 2: Convert to fraction form
   12,720.83/19,085.27 = 5,706.86/x
3. Step 3: Cross multiply
   12,720.83x = 19,085.27 × 5,706.86
4. Step 4: Simplify right side
   12,720.83x = 108,916,839.99
5. Step 5: Solve for x
   x = 108,916,839.99/12,720.83
6. Step 6: Final answer
   x = 8,562.09