Finding the Fourth Proportional to 1,151.86, 1,735.48 and 1,042.31

Step by Step Solution

1. Step 1: Write the proportion equation
   1,151.86 : 1,735.48 = 1,042.31 : x
2. Step 2: Convert to fraction form
   1,151.86/1,735.48 = 1,042.31/x
3. Step 3: Cross multiply
   1,151.86x = 1,735.48 × 1,042.31
4. Step 4: Simplify right side
   1,151.86x = 1,808,908.16
5. Step 5: Solve for x
   x = 1,808,908.16/1,151.86
6. Step 6: Final answer
   x = 1,570.42