Finding the Fourth Proportional to 31,086, 46,648.43 and 12,618

Step by Step Solution

1. Step 1: Write the proportion equation
   31,086 : 46,648.43 = 12,618 : x
2. Step 2: Convert to fraction form
   31,086/46,648.43 = 12,618/x
3. Step 3: Cross multiply
   31,086x = 46,648.43 × 12,618
4. Step 4: Simplify right side
   31,086x = 588,609,889.74
5. Step 5: Solve for x
   x = 588,609,889.74/31,086
6. Step 6: Final answer
   x = 18,934.89