Finding the Fourth Proportional to 8,705.46, 13,055.42 and 2,860.72

Step by Step Solution

1. Step 1: Write the proportion equation
   8,705.46 : 13,055.42 = 2,860.72 : x
2. Step 2: Convert to fraction form
   8,705.46/13,055.42 = 2,860.72/x
3. Step 3: Cross multiply
   8,705.46x = 13,055.42 × 2,860.72
4. Step 4: Simplify right side
   8,705.46x = 37,347,901.10
5. Step 5: Solve for x
   x = 37,347,901.10/8,705.46
6. Step 6: Final answer
   x = 4,290.17