Finding the Fourth Proportional to 30,997.89, 42,774.48 and 19,669.23

Step by Step Solution

1. Step 1: Write the proportion equation
   30,997.89 : 42,774.48 = 19,669.23 : x
2. Step 2: Convert to fraction form
   30,997.89/42,774.48 = 19,669.23/x
3. Step 3: Cross multiply
   30,997.89x = 42,774.48 × 19,669.23
4. Step 4: Simplify right side
   30,997.89x = 841,341,085.25
5. Step 5: Solve for x
   x = 841,341,085.25/30,997.89
6. Step 6: Final answer
   x = 27,141.88