Finding the Fourth Proportional to 1,385.91, 1,911.50 and 966.13

Step by Step Solution

1. Step 1: Write the proportion equation
   1,385.91 : 1,911.50 = 966.13 : x
2. Step 2: Convert to fraction form
   1,385.91/1,911.50 = 966.13/x
3. Step 3: Cross multiply
   1,385.91x = 1,911.50 × 966.13
4. Step 4: Simplify right side
   1,385.91x = 1,846,751.51
5. Step 5: Solve for x
   x = 1,846,751.51/1,385.91
6. Step 6: Final answer
   x = 1,332.52