Finding the Fourth Proportional to 8,759.67, 13,085.31 and 7,880.82

Step by Step Solution

1. Step 1: Write the proportion equation
   8,759.67 : 13,085.31 = 7,880.82 : x
2. Step 2: Convert to fraction form
   8,759.67/13,085.31 = 7,880.82/x
3. Step 3: Cross multiply
   8,759.67x = 13,085.31 × 7,880.82
4. Step 4: Simplify right side
   8,759.67x = 103,122,972.75
5. Step 5: Solve for x
   x = 103,122,972.75/8,759.67
6. Step 6: Final answer
   x = 11,772.47