Finding the Fourth Proportional to 2,670.57, 4,005.87 and 1,026.72

Step by Step Solution

1. Step 1: Write the proportion equation
   2,670.57 : 4,005.87 = 1,026.72 : x
2. Step 2: Convert to fraction form
   2,670.57/4,005.87 = 1,026.72/x
3. Step 3: Cross multiply
   2,670.57x = 4,005.87 × 1,026.72
4. Step 4: Simplify right side
   2,670.57x = 4,112,906.85
5. Step 5: Solve for x
   x = 4,112,906.85/2,670.57
6. Step 6: Final answer
   x = 1,540.09