Finding the Fourth Proportional to 2,858.41, 4,284.37 and 1,213.93

Step by Step Solution

1. Step 1: Write the proportion equation
   2,858.41 : 4,284.37 = 1,213.93 : x
2. Step 2: Convert to fraction form
   2,858.41/4,284.37 = 1,213.93/x
3. Step 3: Cross multiply
   2,858.41x = 4,284.37 × 1,213.93
4. Step 4: Simplify right side
   2,858.41x = 5,200,925.27
5. Step 5: Solve for x
   x = 5,200,925.27/2,858.41
6. Step 6: Final answer
   x = 1,819.52