Finding the Fourth Proportional to 31,126.74, 42,940.98 and 19,185.72

Step by Step Solution

1. Step 1: Write the proportion equation
   31,126.74 : 42,940.98 = 19,185.72 : x
2. Step 2: Convert to fraction form
   31,126.74/42,940.98 = 19,185.72/x
3. Step 3: Cross multiply
   31,126.74x = 42,940.98 × 19,185.72
4. Step 4: Simplify right side
   31,126.74x = 823,853,618.81
5. Step 5: Solve for x
   x = 823,853,618.81/31,126.74
6. Step 6: Final answer
   x = 26,467.71