Finding the Fourth Proportional to 31,199.31, 46,796.33 and 13,429.26

Step by Step Solution

1. Step 1: Write the proportion equation
   31,199.31 : 46,796.33 = 13,429.26 : x
2. Step 2: Convert to fraction form
   31,199.31/46,796.33 = 13,429.26/x
3. Step 3: Cross multiply
   31,199.31x = 46,796.33 × 13,429.26
4. Step 4: Simplify right side
   31,199.31x = 628,440,015.47
5. Step 5: Solve for x
   x = 628,440,015.47/31,199.31
6. Step 6: Final answer
   x = 20,142.75