Finding the Fourth Proportional to 78,865.14, 108,833.78 and 50,570.76

Step by Step Solution

1. Step 1: Write the proportion equation
   78,865.14 : 108,833.78 = 50,570.76 : x
2. Step 2: Convert to fraction form
   78,865.14/108,833.78 = 50,570.76/x
3. Step 3: Cross multiply
   78,865.14x = 108,833.78 × 50,570.76
4. Step 4: Simplify right side
   78,865.14x = 5,503,806,968.27
5. Step 5: Solve for x
   x = 5,503,806,968.27/78,865.14
6. Step 6: Final answer
   x = 69,787.58