Finding the Fourth Proportional to 31,108.56, 42,930.63 and 19,179.78

Step by Step Solution

1. Step 1: Write the proportion equation
   31,108.56 : 42,930.63 = 19,179.78 : x
2. Step 2: Convert to fraction form
   31,108.56/42,930.63 = 19,179.78/x
3. Step 3: Cross multiply
   31,108.56x = 42,930.63 × 19,179.78
4. Step 4: Simplify right side
   31,108.56x = 823,400,038.66
5. Step 5: Solve for x
   x = 823,400,038.66/31,108.56
6. Step 6: Final answer
   x = 26,468.60