Finding the Fourth Proportional to 1,385.77, 1,912.34 and 756.29

Step by Step Solution

1. Step 1: Write the proportion equation
   1,385.77 : 1,912.34 = 756.29 : x
2. Step 2: Convert to fraction form
   1,385.77/1,912.34 = 756.29/x
3. Step 3: Cross multiply
   1,385.77x = 1,912.34 × 756.29
4. Step 4: Simplify right side
   1,385.77x = 1,446,280.73
5. Step 5: Solve for x
   x = 1,446,280.73/1,385.77
6. Step 6: Final answer
   x = 1,043.67