Finding the Fourth Proportional to 31,436.06, 43,389.34 and 18,015.18

Step by Step Solution

1. Step 1: Write the proportion equation
   31,436.06 : 43,389.34 = 18,015.18 : x
2. Step 2: Convert to fraction form
   31,436.06/43,389.34 = 18,015.18/x
3. Step 3: Cross multiply
   31,436.06x = 43,389.34 × 18,015.18
4. Step 4: Simplify right side
   31,436.06x = 781,666,770.18
5. Step 5: Solve for x
   x = 781,666,770.18/31,436.06
6. Step 6: Final answer
   x = 24,865.29