Finding the Fourth Proportional to 255,784.69, 383,663.40 and 78,291.82

Step by Step Solution

1. Step 1: Write the proportion equation
   255,784.69 : 383,663.40 = 78,291.82 : x
2. Step 2: Convert to fraction form
   255,784.69/383,663.40 = 78,291.82/x
3. Step 3: Cross multiply
   255,784.69x = 383,663.40 × 78,291.82
4. Step 4: Simplify right side
   255,784.69x = 30,037,705,853.39
5. Step 5: Solve for x
   x = 30,037,705,853.39/255,784.69
6. Step 6: Final answer
   x = 117,433.56