Finding the Fourth Proportional to 3,721.71, 5,580.95 and 1,256.07

Step by Step Solution

1. Step 1: Write the proportion equation
   3,721.71 : 5,580.95 = 1,256.07 : x
2. Step 2: Convert to fraction form
   3,721.71/5,580.95 = 1,256.07/x
3. Step 3: Cross multiply
   3,721.71x = 5,580.95 × 1,256.07
4. Step 4: Simplify right side
   3,721.71x = 7,010,057.59
5. Step 5: Solve for x
   x = 7,010,057.59/3,721.71
6. Step 6: Final answer
   x = 1,883.56