Finding the Fourth Proportional to 31,118.04, 42,945.12 and 19,186.20

Step by Step Solution

1. Step 1: Write the proportion equation
   31,118.04 : 42,945.12 = 19,186.20 : x
2. Step 2: Convert to fraction form
   31,118.04/42,945.12 = 19,186.20/x
3. Step 3: Cross multiply
   31,118.04x = 42,945.12 × 19,186.20
4. Step 4: Simplify right side
   31,118.04x = 823,953,661.34
5. Step 5: Solve for x
   x = 823,953,661.34/31,118.04
6. Step 6: Final answer
   x = 26,478.33