Finding the Fourth Proportional to 31,153.92, 42,979.41 and 19,829.61

Step by Step Solution

1. Step 1: Write the proportion equation
   31,153.92 : 42,979.41 = 19,829.61 : x
2. Step 2: Convert to fraction form
   31,153.92/42,979.41 = 19,829.61/x
3. Step 3: Cross multiply
   31,153.92x = 42,979.41 × 19,829.61
4. Step 4: Simplify right side
   31,153.92x = 852,264,938.33
5. Step 5: Solve for x
   x = 852,264,938.33/31,153.92
6. Step 6: Final answer
   x = 27,356.59