Finding the Fourth Proportional to 2,772.01, 4,156.80 and 1,039.42

Step by Step Solution

1. Step 1: Write the proportion equation
   2,772.01 : 4,156.80 = 1,039.42 : x
2. Step 2: Convert to fraction form
   2,772.01/4,156.80 = 1,039.42/x
3. Step 3: Cross multiply
   2,772.01x = 4,156.80 × 1,039.42
4. Step 4: Simplify right side
   2,772.01x = 4,320,661.06
5. Step 5: Solve for x
   x = 4,320,661.06/2,772.01
6. Step 6: Final answer
   x = 1,558.67