Finding the Fourth Proportional to 31,680.72, 43,720.56 and 19,103.04

Step by Step Solution

1. Step 1: Write the proportion equation
   31,680.72 : 43,720.56 = 19,103.04 : x
2. Step 2: Convert to fraction form
   31,680.72/43,720.56 = 19,103.04/x
3. Step 3: Cross multiply
   31,680.72x = 43,720.56 × 19,103.04
4. Step 4: Simplify right side
   31,680.72x = 835,195,606.50
5. Step 5: Solve for x
   x = 835,195,606.50/31,680.72
6. Step 6: Final answer
   x = 26,362.90