Finding the Fourth Proportional to 76,769.27, 105,940.51 and 42,779.19

Step by Step Solution

1. Step 1: Write the proportion equation
   76,769.27 : 105,940.51 = 42,779.19 : x
2. Step 2: Convert to fraction form
   76,769.27/105,940.51 = 42,779.19/x
3. Step 3: Cross multiply
   76,769.27x = 105,940.51 × 42,779.19
4. Step 4: Simplify right side
   76,769.27x = 4,532,049,736.95
5. Step 5: Solve for x
   x = 4,532,049,736.95/76,769.27
6. Step 6: Final answer
   x = 59,034.68