Finding the Fourth Proportional to 8,971.59, 12,379.68 and 4,992.42

Step by Step Solution

1. Step 1: Write the proportion equation
   8,971.59 : 12,379.68 = 4,992.42 : x
2. Step 2: Convert to fraction form
   8,971.59/12,379.68 = 4,992.42/x
3. Step 3: Cross multiply
   8,971.59x = 12,379.68 × 4,992.42
4. Step 4: Simplify right side
   8,971.59x = 61,804,562.03
5. Step 5: Solve for x
   x = 61,804,562.03/8,971.59
6. Step 6: Final answer
   x = 6,888.92