Finding the Fourth Proportional to 3,100.76, 4,278.89 and 1,774.61

Step by Step Solution

1. Step 1: Write the proportion equation
   3,100.76 : 4,278.89 = 1,774.61 : x
2. Step 2: Convert to fraction form
   3,100.76/4,278.89 = 1,774.61/x
3. Step 3: Cross multiply
   3,100.76x = 4,278.89 × 1,774.61
4. Step 4: Simplify right side
   3,100.76x = 7,593,330.72
5. Step 5: Solve for x
   x = 7,593,330.72/3,100.76
6. Step 6: Final answer
   x = 2,448.87