Finding the Fourth Proportional to 1,142.56, 1,712.34 and 1,109.32

Step by Step Solution

1. Step 1: Write the proportion equation
   1,142.56 : 1,712.34 = 1,109.32 : x
2. Step 2: Convert to fraction form
   1,142.56/1,712.34 = 1,109.32/x
3. Step 3: Cross multiply
   1,142.56x = 1,712.34 × 1,109.32
4. Step 4: Simplify right side
   1,142.56x = 1,899,533.01
5. Step 5: Solve for x
   x = 1,899,533.01/1,142.56
6. Step 6: Final answer
   x = 1,662.52