Finding the Fourth Proportional to 31,309.59, 46,984.74 and 13,557.59

Step by Step Solution

1. Step 1: Write the proportion equation
   31,309.59 : 46,984.74 = 13,557.59 : x
2. Step 2: Convert to fraction form
   31,309.59/46,984.74 = 13,557.59/x
3. Step 3: Cross multiply
   31,309.59x = 46,984.74 × 13,557.59
4. Step 4: Simplify right side
   31,309.59x = 636,999,606.25
5. Step 5: Solve for x
   x = 636,999,606.25/31,309.59
6. Step 6: Final answer
   x = 20,345.19