Finding the Fourth Proportional to 216,071.69, 298,143.26 and 120,578.15

Step by Step Solution

1. Step 1: Write the proportion equation
   216,071.69 : 298,143.26 = 120,578.15 : x
2. Step 2: Convert to fraction form
   216,071.69/298,143.26 = 120,578.15/x
3. Step 3: Cross multiply
   216,071.69x = 298,143.26 × 120,578.15
4. Step 4: Simplify right side
   216,071.69x = 35,949,562,725.77
5. Step 5: Solve for x
   x = 35,949,562,725.77/216,071.69
6. Step 6: Final answer
   x = 166,377.94