Finding the Fourth Proportional to 297,828.16, 411,098.56 and 190,686.72

Step by Step Solution

1. Step 1: Write the proportion equation
   297,828.16 : 411,098.56 = 190,686.72 : x
2. Step 2: Convert to fraction form
   297,828.16/411,098.56 = 190,686.72/x
3. Step 3: Cross multiply
   297,828.16x = 411,098.56 × 190,686.72
4. Step 4: Simplify right side
   297,828.16x = 78,391,036,003.12
5. Step 5: Solve for x
   x = 78,391,036,003.12/297,828.16
6. Step 6: Final answer
   x = 263,208.95