Finding the Fourth Proportional to 1,385.56, 1,911.72 and 965.44

Step by Step Solution

1. Step 1: Write the proportion equation
   1,385.56 : 1,911.72 = 965.44 : x
2. Step 2: Convert to fraction form
   1,385.56/1,911.72 = 965.44/x
3. Step 3: Cross multiply
   1,385.56x = 1,911.72 × 965.44
4. Step 4: Simplify right side
   1,385.56x = 1,845,650.96
5. Step 5: Solve for x
   x = 1,845,650.96/1,385.56
6. Step 6: Final answer
   x = 1,332.06