Finding the Fourth Proportional to 31,081.24, 46,643.40 and 12,359.35

Step by Step Solution

1. Step 1: Write the proportion equation
   31,081.24 : 46,643.40 = 12,359.35 : x
2. Step 2: Convert to fraction form
   31,081.24/46,643.40 = 12,359.35/x
3. Step 3: Cross multiply
   31,081.24x = 46,643.40 × 12,359.35
4. Step 4: Simplify right side
   31,081.24x = 576,482,105.79
5. Step 5: Solve for x
   x = 576,482,105.79/31,081.24
6. Step 6: Final answer
   x = 18,547.59