Finding the Fourth Proportional to 12,951.98, 19,402.25 and 9,980.12

Step by Step Solution

1. Step 1: Write the proportion equation
   12,951.98 : 19,402.25 = 9,980.12 : x
2. Step 2: Convert to fraction form
   12,951.98/19,402.25 = 9,980.12/x
3. Step 3: Cross multiply
   12,951.98x = 19,402.25 × 9,980.12
4. Step 4: Simplify right side
   12,951.98x = 193,636,783.27
5. Step 5: Solve for x
   x = 193,636,783.27/12,951.98
6. Step 6: Final answer
   x = 14,950.36