Finding the Fourth Proportional to 2,124.35, 3,185.49 and 891.43

Step by Step Solution

1. Step 1: Write the proportion equation
   2,124.35 : 3,185.49 = 891.43 : x
2. Step 2: Convert to fraction form
   2,124.35/3,185.49 = 891.43/x
3. Step 3: Cross multiply
   2,124.35x = 3,185.49 × 891.43
4. Step 4: Simplify right side
   2,124.35x = 2,839,641.35
5. Step 5: Solve for x
   x = 2,839,641.35/2,124.35
6. Step 6: Final answer
   x = 1,336.71