Finding the Fourth Proportional to 458,196.58, 687,394.23 and 191,819.98

Step by Step Solution

1. Step 1: Write the proportion equation
   458,196.58 : 687,394.23 = 191,819.98 : x
2. Step 2: Convert to fraction form
   458,196.58/687,394.23 = 191,819.98/x
3. Step 3: Cross multiply
   458,196.58x = 687,394.23 × 191,819.98
4. Step 4: Simplify right side
   458,196.58x = 131,855,947,450.72
5. Step 5: Solve for x
   x = 131,855,947,450.72/458,196.58
6. Step 6: Final answer
   x = 287,771.57