Finding the Fourth Proportional to 2,014.20, 3,018.86 and 1,039.76

Step by Step Solution

1. Step 1: Write the proportion equation
   2,014.20 : 3,018.86 = 1,039.76 : x
2. Step 2: Convert to fraction form
   2,014.20/3,018.86 = 1,039.76/x
3. Step 3: Cross multiply
   2,014.20x = 3,018.86 × 1,039.76
4. Step 4: Simplify right side
   2,014.20x = 3,138,889.87
5. Step 5: Solve for x
   x = 3,138,889.87/2,014.20
6. Step 6: Final answer
   x = 1,558.38