Finding the Fourth Proportional to 1,818.76, 2,723.85 and 891.40

Step by Step Solution

1. Step 1: Write the proportion equation
   1,818.76 : 2,723.85 = 891.40 : x
2. Step 2: Convert to fraction form
   1,818.76/2,723.85 = 891.40/x
3. Step 3: Cross multiply
   1,818.76x = 2,723.85 × 891.40
4. Step 4: Simplify right side
   1,818.76x = 2,428,039.89
5. Step 5: Solve for x
   x = 2,428,039.89/1,818.76
6. Step 6: Final answer
   x = 1,335.00