Finding the Fourth Proportional to 8,507.85, 12,748.77 and 3,574.79

Step by Step Solution

1. Step 1: Write the proportion equation
   8,507.85 : 12,748.77 = 3,574.79 : x
2. Step 2: Convert to fraction form
   8,507.85/12,748.77 = 3,574.79/x
3. Step 3: Cross multiply
   8,507.85x = 12,748.77 × 3,574.79
4. Step 4: Simplify right side
   8,507.85x = 45,574,111.76
5. Step 5: Solve for x
   x = 45,574,111.76/8,507.85
6. Step 6: Final answer
   x = 5,356.72