Finding the Fourth Proportional to 1,715.12, 2,367.20 and 1,085.56

Step by Step Solution

1. Step 1: Write the proportion equation
   1,715.12 : 2,367.20 = 1,085.56 : x
2. Step 2: Convert to fraction form
   1,715.12/2,367.20 = 1,085.56/x
3. Step 3: Cross multiply
   1,715.12x = 2,367.20 × 1,085.56
4. Step 4: Simplify right side
   1,715.12x = 2,569,737.63
5. Step 5: Solve for x
   x = 2,569,737.63/1,715.12
6. Step 6: Final answer
   x = 1,498.28