Finding the Fourth Proportional to 1,408.72, 1,943.48 and 965.86

Step by Step Solution

1. Step 1: Write the proportion equation
   1,408.72 : 1,943.48 = 965.86 : x
2. Step 2: Convert to fraction form
   1,408.72/1,943.48 = 965.86/x
3. Step 3: Cross multiply
   1,408.72x = 1,943.48 × 965.86
4. Step 4: Simplify right side
   1,408.72x = 1,877,129.59
5. Step 5: Solve for x
   x = 1,877,129.59/1,408.72
6. Step 6: Final answer
   x = 1,332.51