Finding the Fourth Proportional to 3,415.37, 5,128.52 and 2,859.50

Step by Step Solution

1. Step 1: Write the proportion equation
   3,415.37 : 5,128.52 = 2,859.50 : x
2. Step 2: Convert to fraction form
   3,415.37/5,128.52 = 2,859.50/x
3. Step 3: Cross multiply
   3,415.37x = 5,128.52 × 2,859.50
4. Step 4: Simplify right side
   3,415.37x = 14,665,001.46
5. Step 5: Solve for x
   x = 14,665,001.46/3,415.37
6. Step 6: Final answer
   x = 4,293.83