Finding the Fourth Proportional to 78,709.37, 118,032.73 and 28,778.09

Step by Step Solution

1. Step 1: Write the proportion equation
   78,709.37 : 118,032.73 = 28,778.09 : x
2. Step 2: Convert to fraction form
   78,709.37/118,032.73 = 28,778.09/x
3. Step 3: Cross multiply
   78,709.37x = 118,032.73 × 28,778.09
4. Step 4: Simplify right side
   78,709.37x = 3,396,756,526.89
5. Step 5: Solve for x
   x = 3,396,756,526.89/78,709.37
6. Step 6: Final answer
   x = 43,155.68