Finding the Fourth Proportional to 31,326.29, 47,012.79 and 12,606.48

Step by Step Solution

1. Step 1: Write the proportion equation
   31,326.29 : 47,012.79 = 12,606.48 : x
2. Step 2: Convert to fraction form
   31,326.29/47,012.79 = 12,606.48/x
3. Step 3: Cross multiply
   31,326.29x = 47,012.79 × 12,606.48
4. Step 4: Simplify right side
   31,326.29x = 592,665,796.88
5. Step 5: Solve for x
   x = 592,665,796.88/31,326.29
6. Step 6: Final answer
   x = 18,919.12