Finding the Fourth Proportional to 7,856.79, 11,782.69 and 2,590.82

Step by Step Solution

1. Step 1: Write the proportion equation
   7,856.79 : 11,782.69 = 2,590.82 : x
2. Step 2: Convert to fraction form
   7,856.79/11,782.69 = 2,590.82/x
3. Step 3: Cross multiply
   7,856.79x = 11,782.69 × 2,590.82
4. Step 4: Simplify right side
   7,856.79x = 30,526,815.95
5. Step 5: Solve for x
   x = 30,526,815.95/7,856.79
6. Step 6: Final answer
   x = 3,885.41