Finding the Fourth Proportional to 78,781.05, 118,189.17 and 28,860.12

Step by Step Solution

1. Step 1: Write the proportion equation
   78,781.05 : 118,189.17 = 28,860.12 : x
2. Step 2: Convert to fraction form
   78,781.05/118,189.17 = 28,860.12/x
3. Step 3: Cross multiply
   78,781.05x = 118,189.17 × 28,860.12
4. Step 4: Simplify right side
   78,781.05x = 3,410,953,628.90
5. Step 5: Solve for x
   x = 3,410,953,628.90/78,781.05
6. Step 6: Final answer
   x = 43,296.63