Finding the Fourth Proportional to 16,820.30, 25,112.18 and 12,850.76

Step by Step Solution

1. Step 1: Write the proportion equation
   16,820.30 : 25,112.18 = 12,850.76 : x
2. Step 2: Convert to fraction form
   16,820.30/25,112.18 = 12,850.76/x
3. Step 3: Cross multiply
   16,820.30x = 25,112.18 × 12,850.76
4. Step 4: Simplify right side
   16,820.30x = 322,710,598.26
5. Step 5: Solve for x
   x = 322,710,598.26/16,820.30
6. Step 6: Final answer
   x = 19,185.78