Finding the Fourth Proportional to 2,045.72, 3,069.84 and 891.56

Step by Step Solution

1. Step 1: Write the proportion equation
   2,045.72 : 3,069.84 = 891.56 : x
2. Step 2: Convert to fraction form
   2,045.72/3,069.84 = 891.56/x
3. Step 3: Cross multiply
   2,045.72x = 3,069.84 × 891.56
4. Step 4: Simplify right side
   2,045.72x = 2,736,946.55
5. Step 5: Solve for x
   x = 2,736,946.55/2,045.72
6. Step 6: Final answer
   x = 1,337.89