Finding the Fourth Proportional to 369,077.51, 509,258.72 and 216,107.79

Step by Step Solution

1. Step 1: Write the proportion equation
   369,077.51 : 509,258.72 = 216,107.79 : x
2. Step 2: Convert to fraction form
   369,077.51/509,258.72 = 216,107.79/x
3. Step 3: Cross multiply
   369,077.51x = 509,258.72 × 216,107.79
4. Step 4: Simplify right side
   369,077.51x = 110,054,775,436.89
5. Step 5: Solve for x
   x = 110,054,775,436.89/369,077.51
6. Step 6: Final answer
   x = 298,188.79