Finding the Fourth Proportional to 15,705.94, 21,675.72 and 8,992.12

Step by Step Solution

1. Step 1: Write the proportion equation
   15,705.94 : 21,675.72 = 8,992.12 : x
2. Step 2: Convert to fraction form
   15,705.94/21,675.72 = 8,992.12/x
3. Step 3: Cross multiply
   15,705.94x = 21,675.72 × 8,992.12
4. Step 4: Simplify right side
   15,705.94x = 194,910,675.33
5. Step 5: Solve for x
   x = 194,910,675.33/15,705.94
6. Step 6: Final answer
   x = 12,410.00