Finding the Fourth Proportional to 3,054.98, 4,215.16 and 2,111.60

Step by Step Solution

1. Step 1: Write the proportion equation
   3,054.98 : 4,215.16 = 2,111.60 : x
2. Step 2: Convert to fraction form
   3,054.98/4,215.16 = 2,111.60/x
3. Step 3: Cross multiply
   3,054.98x = 4,215.16 × 2,111.60
4. Step 4: Simplify right side
   3,054.98x = 8,900,731.86
5. Step 5: Solve for x
   x = 8,900,731.86/3,054.98
6. Step 6: Final answer
   x = 2,913.52