Finding the Fourth Proportional to 31,146.30, 42,937.38 and 19,201.68

Step by Step Solution

1. Step 1: Write the proportion equation
   31,146.30 : 42,937.38 = 19,201.68 : x
2. Step 2: Convert to fraction form
   31,146.30/42,937.38 = 19,201.68/x
3. Step 3: Cross multiply
   31,146.30x = 42,937.38 × 19,201.68
4. Step 4: Simplify right side
   31,146.30x = 824,469,830.80
5. Step 5: Solve for x
   x = 824,469,830.80/31,146.30
6. Step 6: Final answer
   x = 26,470.88