Finding the Fourth Proportional to 2,607.95, 3,910.64 and 1,290.18

Step by Step Solution

1. Step 1: Write the proportion equation
   2,607.95 : 3,910.64 = 1,290.18 : x
2. Step 2: Convert to fraction form
   2,607.95/3,910.64 = 1,290.18/x
3. Step 3: Cross multiply
   2,607.95x = 3,910.64 × 1,290.18
4. Step 4: Simplify right side
   2,607.95x = 5,045,432.74
5. Step 5: Solve for x
   x = 5,045,432.74/2,607.95
6. Step 6: Final answer
   x = 1,934.63