Finding the Fourth Proportional to 1,520.56, 2,279.89 and 698.95

Step by Step Solution

1. Step 1: Write the proportion equation
   1,520.56 : 2,279.89 = 698.95 : x
2. Step 2: Convert to fraction form
   1,520.56/2,279.89 = 698.95/x
3. Step 3: Cross multiply
   1,520.56x = 2,279.89 × 698.95
4. Step 4: Simplify right side
   1,520.56x = 1,593,529.12
5. Step 5: Solve for x
   x = 1,593,529.12/1,520.56
6. Step 6: Final answer
   x = 1,047.99