Finding the Fourth Proportional to 78,479.09, 116,979.33 and 72,180.53

Step by Step Solution

1. Step 1: Write the proportion equation
   78,479.09 : 116,979.33 = 72,180.53 : x
2. Step 2: Convert to fraction form
   78,479.09/116,979.33 = 72,180.53/x
3. Step 3: Cross multiply
   78,479.09x = 116,979.33 × 72,180.53
4. Step 4: Simplify right side
   78,479.09x = 8,443,629,453.55
5. Step 5: Solve for x
   x = 8,443,629,453.55/78,479.09
6. Step 6: Final answer
   x = 107,590.82