Finding the Fourth Proportional to 78,709.56, 118,081.88 and 28,788.56

Step by Step Solution

1. Step 1: Write the proportion equation
   78,709.56 : 118,081.88 = 28,788.56 : x
2. Step 2: Convert to fraction form
   78,709.56/118,081.88 = 28,788.56/x
3. Step 3: Cross multiply
   78,709.56x = 118,081.88 × 28,788.56
4. Step 4: Simplify right side
   78,709.56x = 3,399,407,287.29
5. Step 5: Solve for x
   x = 3,399,407,287.29/78,709.56
6. Step 6: Final answer
   x = 43,189.26