Finding the Fourth Proportional to 31,129.02, 46,683.72 and 13,581.18

Step by Step Solution

1. Step 1: Write the proportion equation
   31,129.02 : 46,683.72 = 13,581.18 : x
2. Step 2: Convert to fraction form
   31,129.02/46,683.72 = 13,581.18/x
3. Step 3: Cross multiply
   31,129.02x = 46,683.72 × 13,581.18
4. Step 4: Simplify right side
   31,129.02x = 634,020,004.39
5. Step 5: Solve for x
   x = 634,020,004.39/31,129.02
6. Step 6: Final answer
   x = 20,367.49