Finding the Fourth Proportional to 31,622.70, 43,638.09 and 18,196.01

Step by Step Solution

1. Step 1: Write the proportion equation
   31,622.70 : 43,638.09 = 18,196.01 : x
2. Step 2: Convert to fraction form
   31,622.70/43,638.09 = 18,196.01/x
3. Step 3: Cross multiply
   31,622.70x = 43,638.09 × 18,196.01
4. Step 4: Simplify right side
   31,622.70x = 794,038,903.83
5. Step 5: Solve for x
   x = 794,038,903.83/31,622.70
6. Step 6: Final answer
   x = 25,109.78