Finding the Fourth Proportional to 1,385.46, 1,911.98 and 756

Step by Step Solution

1. Step 1: Write the proportion equation
   1,385.46 : 1,911.98 = 756 : x
2. Step 2: Convert to fraction form
   1,385.46/1,911.98 = 756/x
3. Step 3: Cross multiply
   1,385.46x = 1,911.98 × 756
4. Step 4: Simplify right side
   1,385.46x = 1,445,458.77
5. Step 5: Solve for x
   x = 1,445,458.77/1,385.46
6. Step 6: Final answer
   x = 1,043.31