Finding the Fourth Proportional to 1,131.86, 1,560.80 and 945.29

Step by Step Solution

1. Step 1: Write the proportion equation
   1,131.86 : 1,560.80 = 945.29 : x
2. Step 2: Convert to fraction form
   1,131.86/1,560.80 = 945.29/x
3. Step 3: Cross multiply
   1,131.86x = 1,560.80 × 945.29
4. Step 4: Simplify right side
   1,131.86x = 1,475,400.83
5. Step 5: Solve for x
   x = 1,475,400.83/1,131.86
6. Step 6: Final answer
   x = 1,303.52