Finding the Fourth Proportional to 1,431.52, 1,975.27 and 842.17

Step by Step Solution

1. Step 1: Write the proportion equation
   1,431.52 : 1,975.27 = 842.17 : x
2. Step 2: Convert to fraction form
   1,431.52/1,975.27 = 842.17/x
3. Step 3: Cross multiply
   1,431.52x = 1,975.27 × 842.17
4. Step 4: Simplify right side
   1,431.52x = 1,663,513.14
5. Step 5: Solve for x
   x = 1,663,513.14/1,431.52
6. Step 6: Final answer
   x = 1,162.06