Finding the Fourth Proportional to 2,951.51, 4,428.61 and 1,286.15

Step by Step Solution

1. Step 1: Write the proportion equation
   2,951.51 : 4,428.61 = 1,286.15 : x
2. Step 2: Convert to fraction form
   2,951.51/4,428.61 = 1,286.15/x
3. Step 3: Cross multiply
   2,951.51x = 4,428.61 × 1,286.15
4. Step 4: Simplify right side
   2,951.51x = 5,695,856.75
5. Step 5: Solve for x
   x = 5,695,856.75/2,951.51
6. Step 6: Final answer
   x = 1,929.81