Finding the Fourth Proportional to 8,746.78, 12,072.18 and 5,020.78

Step by Step Solution

1. Step 1: Write the proportion equation
   8,746.78 : 12,072.18 = 5,020.78 : x
2. Step 2: Convert to fraction form
   8,746.78/12,072.18 = 5,020.78/x
3. Step 3: Cross multiply
   8,746.78x = 12,072.18 × 5,020.78
4. Step 4: Simplify right side
   8,746.78x = 60,611,759.90
5. Step 5: Solve for x
   x = 60,611,759.90/8,746.78
6. Step 6: Final answer
   x = 6,929.61