Finding the Fourth Proportional to 3,905.71, 5,859.17 and 1,272.59

Step by Step Solution

1. Step 1: Write the proportion equation
   3,905.71 : 5,859.17 = 1,272.59 : x
2. Step 2: Convert to fraction form
   3,905.71/5,859.17 = 1,272.59/x
3. Step 3: Cross multiply
   3,905.71x = 5,859.17 × 1,272.59
4. Step 4: Simplify right side
   3,905.71x = 7,456,314.79
5. Step 5: Solve for x
   x = 7,456,314.79/3,905.71
6. Step 6: Final answer
   x = 1,909.08