Finding the Fourth Proportional to 300,910.40, 415,300.56 and 173,561.12

Step by Step Solution

1. Step 1: Write the proportion equation
   300,910.40 : 415,300.56 = 173,561.12 : x
2. Step 2: Convert to fraction form
   300,910.40/415,300.56 = 173,561.12/x
3. Step 3: Cross multiply
   300,910.40x = 415,300.56 × 173,561.12
4. Step 4: Simplify right side
   300,910.40x = 72,080,030,330.23
5. Step 5: Solve for x
   x = 72,080,030,330.23/300,910.40
6. Step 6: Final answer
   x = 239,539.84