Finding the Fourth Proportional to 8,500.57, 12,758.34 and 4,555.06

Step by Step Solution

1. Step 1: Write the proportion equation
   8,500.57 : 12,758.34 = 4,555.06 : x
2. Step 2: Convert to fraction form
   8,500.57/12,758.34 = 4,555.06/x
3. Step 3: Cross multiply
   8,500.57x = 12,758.34 × 4,555.06
4. Step 4: Simplify right side
   8,500.57x = 58,115,004.20
5. Step 5: Solve for x
   x = 58,115,004.20/8,500.57
6. Step 6: Final answer
   x = 6,836.60