Finding the Fourth Proportional to 216,499,290.54, 298,479,996.78 and 171,992,934.96

Step by Step Solution

1. Step 1: Write the proportion equation
   216,499,290.54 : 298,479,996.78 = 171,992,934.96 : x
2. Step 2: Convert to fraction form
   216,499,290.54/298,479,996.78 = 171,992,934.96/x
3. Step 3: Cross multiply
   216,499,290.54x = 298,479,996.78 × 171,992,934.96
4. Step 4: Simplify right side
   216,499,290.54x = 51,336,450,673,043,544
5. Step 5: Solve for x
   x = 51,336,450,673,043,544/216,499,290.54
6. Step 6: Final answer
   x = 237,120,641.57