Finding the Fourth Proportional to 12,986.88, 19,474.56 and 8,056.32

Step by Step Solution

1. Step 1: Write the proportion equation
   12,986.88 : 19,474.56 = 8,056.32 : x
2. Step 2: Convert to fraction form
   12,986.88/19,474.56 = 8,056.32/x
3. Step 3: Cross multiply
   12,986.88x = 19,474.56 × 8,056.32
4. Step 4: Simplify right side
   12,986.88x = 156,893,287.22
5. Step 5: Solve for x
   x = 156,893,287.22/12,986.88
6. Step 6: Final answer
   x = 12,080.91