Finding the Fourth Proportional to 12,893.18, 17,792.76 and 7,857.61

Step by Step Solution

1. Step 1: Write the proportion equation
   12,893.18 : 17,792.76 = 7,857.61 : x
2. Step 2: Convert to fraction form
   12,893.18/17,792.76 = 7,857.61/x
3. Step 3: Cross multiply
   12,893.18x = 17,792.76 × 7,857.61
4. Step 4: Simplify right side
   12,893.18x = 139,808,553.89
5. Step 5: Solve for x
   x = 139,808,553.89/12,893.18
6. Step 6: Final answer
   x = 10,843.61