Finding the Fourth Proportional to 1,487.71, 2,229.90 and 755.78

Step by Step Solution

1. Step 1: Write the proportion equation
   1,487.71 : 2,229.90 = 755.78 : x
2. Step 2: Convert to fraction form
   1,487.71/2,229.90 = 755.78/x
3. Step 3: Cross multiply
   1,487.71x = 2,229.90 × 755.78
4. Step 4: Simplify right side
   1,487.71x = 1,685,313.82
5. Step 5: Solve for x
   x = 1,685,313.82/1,487.71
6. Step 6: Final answer
   x = 1,132.82