Finding the Fourth Proportional to 8,915.76, 12,302.06 and 5,729.63

Step by Step Solution

1. Step 1: Write the proportion equation
   8,915.76 : 12,302.06 = 5,729.63 : x
2. Step 2: Convert to fraction form
   8,915.76/12,302.06 = 5,729.63/x
3. Step 3: Cross multiply
   8,915.76x = 12,302.06 × 5,729.63
4. Step 4: Simplify right side
   8,915.76x = 70,486,161.88
5. Step 5: Solve for x
   x = 70,486,161.88/8,915.76
6. Step 6: Final answer
   x = 7,905.79