Finding the Fourth Proportional to 31,431.05, 43,376.42 and 19,498.23

Step by Step Solution

1. Step 1: Write the proportion equation
   31,431.05 : 43,376.42 = 19,498.23 : x
2. Step 2: Convert to fraction form
   31,431.05/43,376.42 = 19,498.23/x
3. Step 3: Cross multiply
   31,431.05x = 43,376.42 × 19,498.23
4. Step 4: Simplify right side
   31,431.05x = 845,763,196.85
5. Step 5: Solve for x
   x = 845,763,196.85/31,431.05
6. Step 6: Final answer
   x = 26,908.53