Finding the Fourth Proportional to 2,638.15, 3,956.61 and 1,176.50

Step by Step Solution

1. Step 1: Write the proportion equation
   2,638.15 : 3,956.61 = 1,176.50 : x
2. Step 2: Convert to fraction form
   2,638.15/3,956.61 = 1,176.50/x
3. Step 3: Cross multiply
   2,638.15x = 3,956.61 × 1,176.50
4. Step 4: Simplify right side
   2,638.15x = 4,654,951.67
5. Step 5: Solve for x
   x = 4,654,951.67/2,638.15
6. Step 6: Final answer
   x = 1,764.48