Finding the Fourth Proportional to 78,724.69, 118,074.86 and 28,793.11

Step by Step Solution

1. Step 1: Write the proportion equation
   78,724.69 : 118,074.86 = 28,793.11 : x
2. Step 2: Convert to fraction form
   78,724.69/118,074.86 = 28,793.11/x
3. Step 3: Cross multiply
   78,724.69x = 118,074.86 × 28,793.11
4. Step 4: Simplify right side
   78,724.69x = 3,399,742,705.78
5. Step 5: Solve for x
   x = 3,399,742,705.78/78,724.69
6. Step 6: Final answer
   x = 43,185.21