Finding the Fourth Proportional to 31,355.79, 47,035.23 and 12,633.31

Step by Step Solution

1. Step 1: Write the proportion equation
   31,355.79 : 47,035.23 = 12,633.31 : x
2. Step 2: Convert to fraction form
   31,355.79/47,035.23 = 12,633.31/x
3. Step 3: Cross multiply
   31,355.79x = 47,035.23 × 12,633.31
4. Step 4: Simplify right side
   31,355.79x = 594,210,641.51
5. Step 5: Solve for x
   x = 594,210,641.51/31,355.79
6. Step 6: Final answer
   x = 18,950.59