Finding the Fourth Proportional to 31,105.25, 42,925.25 and 19,927.25

Step by Step Solution

1. Step 1: Write the proportion equation
   31,105.25 : 42,925.25 = 19,927.25 : x
2. Step 2: Convert to fraction form
   31,105.25/42,925.25 = 19,927.25/x
3. Step 3: Cross multiply
   31,105.25x = 42,925.25 × 19,927.25
4. Step 4: Simplify right side
   31,105.25x = 855,382,088.43
5. Step 5: Solve for x
   x = 855,382,088.43/31,105.25
6. Step 6: Final answer
   x = 27,499.61