Finding the Fourth Proportional to 76,795.80, 105,986.79 and 42,807.39

Step by Step Solution

1. Step 1: Write the proportion equation
   76,795.80 : 105,986.79 = 42,807.39 : x
2. Step 2: Convert to fraction form
   76,795.80/105,986.79 = 42,807.39/x
3. Step 3: Cross multiply
   76,795.80x = 105,986.79 × 42,807.39
4. Step 4: Simplify right side
   76,795.80x = 4,537,017,854.38
5. Step 5: Solve for x
   x = 4,537,017,854.38/76,795.80
6. Step 6: Final answer
   x = 59,078.98