Finding the Fourth Proportional to 5,875.20, 8,109.20 and 3,518.72

Step by Step Solution

1. Step 1: Write the proportion equation
   5,875.20 : 8,109.20 = 3,518.72 : x
2. Step 2: Convert to fraction form
   5,875.20/8,109.20 = 3,518.72/x
3. Step 3: Cross multiply
   5,875.20x = 8,109.20 × 3,518.72
4. Step 4: Simplify right side
   5,875.20x = 28,534,004.22
5. Step 5: Solve for x
   x = 28,534,004.22/5,875.20
6. Step 6: Final answer
   x = 4,856.69