Finding the Fourth Proportional to 31,009.68, 46,513.48 and 13,479.50

Step by Step Solution

1. Step 1: Write the proportion equation
   31,009.68 : 46,513.48 = 13,479.50 : x
2. Step 2: Convert to fraction form
   31,009.68/46,513.48 = 13,479.50/x
3. Step 3: Cross multiply
   31,009.68x = 46,513.48 × 13,479.50
4. Step 4: Simplify right side
   31,009.68x = 626,978,453.66
5. Step 5: Solve for x
   x = 626,978,453.66/31,009.68
6. Step 6: Final answer
   x = 20,218.80