Finding the Fourth Proportional to 2,054.80, 2,835.03 and 1,215.10

Step by Step Solution

1. Step 1: Write the proportion equation
   2,054.80 : 2,835.03 = 1,215.10 : x
2. Step 2: Convert to fraction form
   2,054.80/2,835.03 = 1,215.10/x
3. Step 3: Cross multiply
   2,054.80x = 2,835.03 × 1,215.10
4. Step 4: Simplify right side
   2,054.80x = 3,444,844.95
5. Step 5: Solve for x
   x = 3,444,844.95/2,054.80
6. Step 6: Final answer
   x = 1,676.49