Finding the Fourth Proportional to 256,648, 385,007.52 and 79,168.96

Step by Step Solution

1. Step 1: Write the proportion equation
   256,648 : 385,007.52 = 79,168.96 : x
2. Step 2: Convert to fraction form
   256,648/385,007.52 = 79,168.96/x
3. Step 3: Cross multiply
   256,648x = 385,007.52 × 79,168.96
4. Step 4: Simplify right side
   256,648x = 30,480,644,950.58
5. Step 5: Solve for x
   x = 30,480,644,950.58/256,648
6. Step 6: Final answer
   x = 118,764.40