Finding the Fourth Proportional to 2,051.10, 2,830.16 and 1,211.74

Step by Step Solution

1. Step 1: Write the proportion equation
   2,051.10 : 2,830.16 = 1,211.74 : x
2. Step 2: Convert to fraction form
   2,051.10/2,830.16 = 1,211.74/x
3. Step 3: Cross multiply
   2,051.10x = 2,830.16 × 1,211.74
4. Step 4: Simplify right side
   2,051.10x = 3,429,418.08
5. Step 5: Solve for x
   x = 3,429,418.08/2,051.10
6. Step 6: Final answer
   x = 1,671.99