Finding the Fourth Proportional to 30,749.48, 42,435.86 and 18,809.08

Step by Step Solution

1. Step 1: Write the proportion equation
   30,749.48 : 42,435.86 = 18,809.08 : x
2. Step 2: Convert to fraction form
   30,749.48/42,435.86 = 18,809.08/x
3. Step 3: Cross multiply
   30,749.48x = 42,435.86 × 18,809.08
4. Step 4: Simplify right side
   30,749.48x = 798,179,485.61
5. Step 5: Solve for x
   x = 798,179,485.61/30,749.48
6. Step 6: Final answer
   x = 25,957.50