Finding the Fourth Proportional to 2,051.58, 2,830.72 and 1,212.32

Step by Step Solution

1. Step 1: Write the proportion equation
   2,051.58 : 2,830.72 = 1,212.32 : x
2. Step 2: Convert to fraction form
   2,051.58/2,830.72 = 1,212.32/x
3. Step 3: Cross multiply
   2,051.58x = 2,830.72 × 1,212.32
4. Step 4: Simplify right side
   2,051.58x = 3,431,732.28
5. Step 5: Solve for x
   x = 3,431,732.28/2,051.58
6. Step 6: Final answer
   x = 1,672.73