Finding the Fourth Proportional to 76,678.86, 105,795.54 and 49,443.42

Step by Step Solution

1. Step 1: Write the proportion equation
   76,678.86 : 105,795.54 = 49,443.42 : x
2. Step 2: Convert to fraction form
   76,678.86/105,795.54 = 49,443.42/x
3. Step 3: Cross multiply
   76,678.86x = 105,795.54 × 49,443.42
4. Step 4: Simplify right side
   76,678.86x = 5,230,893,318.35
5. Step 5: Solve for x
   x = 5,230,893,318.35/76,678.86
6. Step 6: Final answer
   x = 68,218.19