Finding the Fourth Proportional to 30,648.63, 45,892.72 and 20,085.42

Step by Step Solution

1. Step 1: Write the proportion equation
   30,648.63 : 45,892.72 = 20,085.42 : x
2. Step 2: Convert to fraction form
   30,648.63/45,892.72 = 20,085.42/x
3. Step 3: Cross multiply
   30,648.63x = 45,892.72 × 20,085.42
4. Step 4: Simplify right side
   30,648.63x = 921,774,556.14
5. Step 5: Solve for x
   x = 921,774,556.14/30,648.63
6. Step 6: Final answer
   x = 30,075.55