Finding the Fourth Proportional to 78,706.56, 118,061.28 and 28,786.62

Step by Step Solution

1. Step 1: Write the proportion equation
   78,706.56 : 118,061.28 = 28,786.62 : x
2. Step 2: Convert to fraction form
   78,706.56/118,061.28 = 28,786.62/x
3. Step 3: Cross multiply
   78,706.56x = 118,061.28 × 28,786.62
4. Step 4: Simplify right side
   78,706.56x = 3,398,585,204.07
5. Step 5: Solve for x
   x = 3,398,585,204.07/78,706.56
6. Step 6: Final answer
   x = 43,180.46