Finding the Fourth Proportional to 2,002.96, 3,002.58 and 891.80

Step by Step Solution

1. Step 1: Write the proportion equation
   2,002.96 : 3,002.58 = 891.80 : x
2. Step 2: Convert to fraction form
   2,002.96/3,002.58 = 891.80/x
3. Step 3: Cross multiply
   2,002.96x = 3,002.58 × 891.80
4. Step 4: Simplify right side
   2,002.96x = 2,677,700.84
5. Step 5: Solve for x
   x = 2,677,700.84/2,002.96
6. Step 6: Final answer
   x = 1,336.87