Finding the Fourth Proportional to 16,980.12, 25,423.38 and 12,807.50

Step by Step Solution

1. Step 1: Write the proportion equation
   16,980.12 : 25,423.38 = 12,807.50 : x
2. Step 2: Convert to fraction form
   16,980.12/25,423.38 = 12,807.50/x
3. Step 3: Cross multiply
   16,980.12x = 25,423.38 × 12,807.50
4. Step 4: Simplify right side
   16,980.12x = 325,609,812.23
5. Step 5: Solve for x
   x = 325,609,812.23/16,980.12
6. Step 6: Final answer
   x = 19,175.94