Finding the Fourth Proportional to 2,773.60, 4,160.88 and 1,042.72

Step by Step Solution

1. Step 1: Write the proportion equation
   2,773.60 : 4,160.88 = 1,042.72 : x
2. Step 2: Convert to fraction form
   2,773.60/4,160.88 = 1,042.72/x
3. Step 3: Cross multiply
   2,773.60x = 4,160.88 × 1,042.72
4. Step 4: Simplify right side
   2,773.60x = 4,338,632.79
5. Step 5: Solve for x
   x = 4,338,632.79/2,773.60
6. Step 6: Final answer
   x = 1,564.26