Finding the Fourth Proportional to 1,341.09, 2,012.00 and 1,212.57

Step by Step Solution

1. Step 1: Write the proportion equation
   1,341.09 : 2,012.00 = 1,212.57 : x
2. Step 2: Convert to fraction form
   1,341.09/2,012.00 = 1,212.57/x
3. Step 3: Cross multiply
   1,341.09x = 2,012.00 × 1,212.57
4. Step 4: Simplify right side
   1,341.09x = 2,439,684.78
5. Step 5: Solve for x
   x = 2,439,684.78/1,341.09
6. Step 6: Final answer
   x = 1,819.18