Finding the Fourth Proportional to 1,385.87, 1,912.47 and 756.41

Step by Step Solution

1. Step 1: Write the proportion equation
   1,385.87 : 1,912.47 = 756.41 : x
2. Step 2: Convert to fraction form
   1,385.87/1,912.47 = 756.41/x
3. Step 3: Cross multiply
   1,385.87x = 1,912.47 × 756.41
4. Step 4: Simplify right side
   1,385.87x = 1,446,599.03
5. Step 5: Solve for x
   x = 1,446,599.03/1,385.87
6. Step 6: Final answer
   x = 1,043.82