Finding the Fourth Proportional to 12,886.31, 17,783.54 and 12,295.82

Step by Step Solution

1. Step 1: Write the proportion equation
   12,886.31 : 17,783.54 = 12,295.82 : x
2. Step 2: Convert to fraction form
   12,886.31/17,783.54 = 12,295.82/x
3. Step 3: Cross multiply
   12,886.31x = 17,783.54 × 12,295.82
4. Step 4: Simplify right side
   12,886.31x = 218,663,056.41
5. Step 5: Solve for x
   x = 218,663,056.41/12,886.31
6. Step 6: Final answer
   x = 16,968.64