Finding the Fourth Proportional to 30,999.05, 42,719.69 and 22,486.49

Step by Step Solution

1. Step 1: Write the proportion equation
   30,999.05 : 42,719.69 = 22,486.49 : x
2. Step 2: Convert to fraction form
   30,999.05/42,719.69 = 22,486.49/x
3. Step 3: Cross multiply
   30,999.05x = 42,719.69 × 22,486.49
4. Step 4: Simplify right side
   30,999.05x = 960,615,724.61
5. Step 5: Solve for x
   x = 960,615,724.61/30,999.05
6. Step 6: Final answer
   x = 30,988.56