Finding the Fourth Proportional to 1,992.50, 2,988.71 and 1,212.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,992.50 : 2,988.71 = 1,212.72 : x
2. Step 2: Convert to fraction form
   1,992.50/2,988.71 = 1,212.72/x
3. Step 3: Cross multiply
   1,992.50x = 2,988.71 × 1,212.72
4. Step 4: Simplify right side
   1,992.50x = 3,624,453.45
5. Step 5: Solve for x
   x = 3,624,453.45/1,992.50
6. Step 6: Final answer
   x = 1,819.05