Finding the Fourth Proportional to 8,731.98, 12,038.76 and 7,857.18

Step by Step Solution

1. Step 1: Write the proportion equation
   8,731.98 : 12,038.76 = 7,857.18 : x
2. Step 2: Convert to fraction form
   8,731.98/12,038.76 = 7,857.18/x
3. Step 3: Cross multiply
   8,731.98x = 12,038.76 × 7,857.18
4. Step 4: Simplify right side
   8,731.98x = 94,590,704.30
5. Step 5: Solve for x
   x = 94,590,704.30/8,731.98
6. Step 6: Final answer
   x = 10,832.68