Finding the Fourth Proportional to 30,870.84, 42,557.16 and 20,242.04

Step by Step Solution

1. Step 1: Write the proportion equation
   30,870.84 : 42,557.16 = 20,242.04 : x
2. Step 2: Convert to fraction form
   30,870.84/42,557.16 = 20,242.04/x
3. Step 3: Cross multiply
   30,870.84x = 42,557.16 × 20,242.04
4. Step 4: Simplify right side
   30,870.84x = 861,443,735.01
5. Step 5: Solve for x
   x = 861,443,735.01/30,870.84
6. Step 6: Final answer
   x = 27,904.77