Finding the Fourth Proportional to 12,189.98, 16,819.71 and 7,412.50

Step by Step Solution

1. Step 1: Write the proportion equation
   12,189.98 : 16,819.71 = 7,412.50 : x
2. Step 2: Convert to fraction form
   12,189.98/16,819.71 = 7,412.50/x
3. Step 3: Cross multiply
   12,189.98x = 16,819.71 × 7,412.50
4. Step 4: Simplify right side
   12,189.98x = 124,676,100.38
5. Step 5: Solve for x
   x = 124,676,100.38/12,189.98
6. Step 6: Final answer
   x = 10,227.75