Finding the Fourth Proportional to 1,082.35, 1,617.78 and 1,056.43

Step by Step Solution

1. Step 1: Write the proportion equation
   1,082.35 : 1,617.78 = 1,056.43 : x
2. Step 2: Convert to fraction form
   1,082.35/1,617.78 = 1,056.43/x
3. Step 3: Cross multiply
   1,082.35x = 1,617.78 × 1,056.43
4. Step 4: Simplify right side
   1,082.35x = 1,709,071.33
5. Step 5: Solve for x
   x = 1,709,071.33/1,082.35
6. Step 6: Final answer
   x = 1,579.04