Finding the Fourth Proportional to 1,142.32, 1,576.56 and 847.12

Step by Step Solution

1. Step 1: Write the proportion equation
   1,142.32 : 1,576.56 = 847.12 : x
2. Step 2: Convert to fraction form
   1,142.32/1,576.56 = 847.12/x
3. Step 3: Cross multiply
   1,142.32x = 1,576.56 × 847.12
4. Step 4: Simplify right side
   1,142.32x = 1,335,535.51
5. Step 5: Solve for x
   x = 1,335,535.51/1,142.32
6. Step 6: Final answer
   x = 1,169.14