Finding the Fourth Proportional to 2,659.16, 3,989.88 and 1,272.53

Step by Step Solution

1. Step 1: Write the proportion equation
   2,659.16 : 3,989.88 = 1,272.53 : x
2. Step 2: Convert to fraction form
   2,659.16/3,989.88 = 1,272.53/x
3. Step 3: Cross multiply
   2,659.16x = 3,989.88 × 1,272.53
4. Step 4: Simplify right side
   2,659.16x = 5,077,222.05
5. Step 5: Solve for x
   x = 5,077,222.05/2,659.16
6. Step 6: Final answer
   x = 1,909.34