Finding the Fourth Proportional to 2,124.53, 3,185.51 and 891.30

Step by Step Solution

1. Step 1: Write the proportion equation
   2,124.53 : 3,185.51 = 891.30 : x
2. Step 2: Convert to fraction form
   2,124.53/3,185.51 = 891.30/x
3. Step 3: Cross multiply
   2,124.53x = 3,185.51 × 891.30
4. Step 4: Simplify right side
   2,124.53x = 2,839,240.61
5. Step 5: Solve for x
   x = 2,839,240.61/2,124.53
6. Step 6: Final answer
   x = 1,336.41