Finding the Fourth Proportional to 12,987.38, 19,475.31 and 8,056.82

Step by Step Solution

1. Step 1: Write the proportion equation
   12,987.38 : 19,475.31 = 8,056.82 : x
2. Step 2: Convert to fraction form
   12,987.38/19,475.31 = 8,056.82/x
3. Step 3: Cross multiply
   12,987.38x = 19,475.31 × 8,056.82
4. Step 4: Simplify right side
   12,987.38x = 156,909,067.11
5. Step 5: Solve for x
   x = 156,909,067.11/12,987.38
6. Step 6: Final answer
   x = 12,081.66