Finding the Fourth Proportional to 30,620.35, 42,253.50 and 18,525.34

Step by Step Solution

1. Step 1: Write the proportion equation
   30,620.35 : 42,253.50 = 18,525.34 : x
2. Step 2: Convert to fraction form
   30,620.35/42,253.50 = 18,525.34/x
3. Step 3: Cross multiply
   30,620.35x = 42,253.50 × 18,525.34
4. Step 4: Simplify right side
   30,620.35x = 782,760,453.69
5. Step 5: Solve for x
   x = 782,760,453.69/30,620.35
6. Step 6: Final answer
   x = 25,563.41