Finding the Fourth Proportional to 31,109.56, 42,932.01 and 19,180.78

Step by Step Solution

1. Step 1: Write the proportion equation
   31,109.56 : 42,932.01 = 19,180.78 : x
2. Step 2: Convert to fraction form
   31,109.56/42,932.01 = 19,180.78/x
3. Step 3: Cross multiply
   31,109.56x = 42,932.01 × 19,180.78
4. Step 4: Simplify right side
   31,109.56x = 823,469,438.77
5. Step 5: Solve for x
   x = 823,469,438.77/31,109.56
6. Step 6: Final answer
   x = 26,469.98