Finding the Fourth Proportional to 3,519.74, 5,278.05 and 1,054.10

Step by Step Solution

1. Step 1: Write the proportion equation
   3,519.74 : 5,278.05 = 1,054.10 : x
2. Step 2: Convert to fraction form
   3,519.74/5,278.05 = 1,054.10/x
3. Step 3: Cross multiply
   3,519.74x = 5,278.05 × 1,054.10
4. Step 4: Simplify right side
   3,519.74x = 5,563,608.34
5. Step 5: Solve for x
   x = 5,563,608.34/3,519.74
6. Step 6: Final answer
   x = 1,580.69