Finding the Fourth Proportional to 31,019.42, 42,805.51 and 18,273.13

Step by Step Solution

1. Step 1: Write the proportion equation
   31,019.42 : 42,805.51 = 18,273.13 : x
2. Step 2: Convert to fraction form
   31,019.42/42,805.51 = 18,273.13/x
3. Step 3: Cross multiply
   31,019.42x = 42,805.51 × 18,273.13
4. Step 4: Simplify right side
   31,019.42x = 782,190,496.25
5. Step 5: Solve for x
   x = 782,190,496.25/31,019.42
6. Step 6: Final answer
   x = 25,216.15