Finding the Fourth Proportional to 30,881.03, 42,581.98 and 20,106.02

Step by Step Solution

1. Step 1: Write the proportion equation
   30,881.03 : 42,581.98 = 20,106.02 : x
2. Step 2: Convert to fraction form
   30,881.03/42,581.98 = 20,106.02/x
3. Step 3: Cross multiply
   30,881.03x = 42,581.98 × 20,106.02
4. Step 4: Simplify right side
   30,881.03x = 856,154,141.52
5. Step 5: Solve for x
   x = 856,154,141.52/30,881.03
6. Step 6: Final answer
   x = 27,724.27