Finding the Fourth Proportional to 1,043.84, 1,560.72 and 891.56

Step by Step Solution

1. Step 1: Write the proportion equation
   1,043.84 : 1,560.72 = 891.56 : x
2. Step 2: Convert to fraction form
   1,043.84/1,560.72 = 891.56/x
3. Step 3: Cross multiply
   1,043.84x = 1,560.72 × 891.56
4. Step 4: Simplify right side
   1,043.84x = 1,391,475.52
5. Step 5: Solve for x
   x = 1,391,475.52/1,043.84
6. Step 6: Final answer
   x = 1,333.04