Finding the Fourth Proportional to 12,885.15, 17,781.51 and 7,849.37

Step by Step Solution

1. Step 1: Write the proportion equation
   12,885.15 : 17,781.51 = 7,849.37 : x
2. Step 2: Convert to fraction form
   12,885.15/17,781.51 = 7,849.37/x
3. Step 3: Cross multiply
   12,885.15x = 17,781.51 × 7,849.37
4. Step 4: Simplify right side
   12,885.15x = 139,573,675.14
5. Step 5: Solve for x
   x = 139,573,675.14/12,885.15
6. Step 6: Final answer
   x = 10,832.13