Finding the Fourth Proportional to 31,081.02, 46,609.86 and 13,311.18

Step by Step Solution

1. Step 1: Write the proportion equation
   31,081.02 : 46,609.86 = 13,311.18 : x
2. Step 2: Convert to fraction form
   31,081.02/46,609.86 = 13,311.18/x
3. Step 3: Cross multiply
   31,081.02x = 46,609.86 × 13,311.18
4. Step 4: Simplify right side
   31,081.02x = 620,432,236.23
5. Step 5: Solve for x
   x = 620,432,236.23/31,081.02
6. Step 6: Final answer
   x = 19,961.77