Finding the Fourth Proportional to 31,105.83, 46,678.10 and 12,637.83

Step by Step Solution

1. Step 1: Write the proportion equation
   31,105.83 : 46,678.10 = 12,637.83 : x
2. Step 2: Convert to fraction form
   31,105.83/46,678.10 = 12,637.83/x
3. Step 3: Cross multiply
   31,105.83x = 46,678.10 × 12,637.83
4. Step 4: Simplify right side
   31,105.83x = 589,909,829.33
5. Step 5: Solve for x
   x = 589,909,829.33/31,105.83
6. Step 6: Final answer
   x = 18,964.61