Finding the Fourth Proportional to 300,870.78, 415,147.24 and 193,416.18

Step by Step Solution

1. Step 1: Write the proportion equation
   300,870.78 : 415,147.24 = 193,416.18 : x
2. Step 2: Convert to fraction form
   300,870.78/415,147.24 = 193,416.18/x
3. Step 3: Cross multiply
   300,870.78x = 415,147.24 × 193,416.18
4. Step 4: Simplify right side
   300,870.78x = 80,296,193,298.34
5. Step 5: Solve for x
   x = 80,296,193,298.34/300,870.78
6. Step 6: Final answer
   x = 266,879.33