Finding the Fourth Proportional to 1,705.28, 2,559.12 and 1,156.10

Step by Step Solution

1. Step 1: Write the proportion equation
   1,705.28 : 2,559.12 = 1,156.10 : x
2. Step 2: Convert to fraction form
   1,705.28/2,559.12 = 1,156.10/x
3. Step 3: Cross multiply
   1,705.28x = 2,559.12 × 1,156.10
4. Step 4: Simplify right side
   1,705.28x = 2,958,598.63
5. Step 5: Solve for x
   x = 2,958,598.63/1,705.28
6. Step 6: Final answer
   x = 1,734.96