Finding the Fourth Proportional to 31,498.79, 47,224.71 and 13,726.08

Step by Step Solution

1. Step 1: Write the proportion equation
   31,498.79 : 47,224.71 = 13,726.08 : x
2. Step 2: Convert to fraction form
   31,498.79/47,224.71 = 13,726.08/x
3. Step 3: Cross multiply
   31,498.79x = 47,224.71 × 13,726.08
4. Step 4: Simplify right side
   31,498.79x = 648,210,147.44
5. Step 5: Solve for x
   x = 648,210,147.44/31,498.79
6. Step 6: Final answer
   x = 20,578.89