Finding the Fourth Proportional to 30,852.01, 42,566.70 and 20,791.81

Step by Step Solution

1. Step 1: Write the proportion equation
   30,852.01 : 42,566.70 = 20,791.81 : x
2. Step 2: Convert to fraction form
   30,852.01/42,566.70 = 20,791.81/x
3. Step 3: Cross multiply
   30,852.01x = 42,566.70 × 20,791.81
4. Step 4: Simplify right side
   30,852.01x = 885,038,738.73
5. Step 5: Solve for x
   x = 885,038,738.73/30,852.01
6. Step 6: Final answer
   x = 28,686.58