Finding the Fourth Proportional to 31,126.23, 42,940.31 and 19,185.21

Step by Step Solution

1. Step 1: Write the proportion equation
   31,126.23 : 42,940.31 = 19,185.21 : x
2. Step 2: Convert to fraction form
   31,126.23/42,940.31 = 19,185.21/x
3. Step 3: Cross multiply
   31,126.23x = 42,940.31 × 19,185.21
4. Step 4: Simplify right side
   31,126.23x = 823,818,768.89
5. Step 5: Solve for x
   x = 823,818,768.89/31,126.23
6. Step 6: Final answer
   x = 26,467.03