Finding the Fourth Proportional to 23,079.31, 34,683.91 and 13,721.00

Step by Step Solution

1. Step 1: Write the proportion equation
   23,079.31 : 34,683.91 = 13,721.00 : x
2. Step 2: Convert to fraction form
   23,079.31/34,683.91 = 13,721.00/x
3. Step 3: Cross multiply
   23,079.31x = 34,683.91 × 13,721.00
4. Step 4: Simplify right side
   23,079.31x = 475,897,721.39
5. Step 5: Solve for x
   x = 475,897,721.39/23,079.31
6. Step 6: Final answer
   x = 20,620.10