Finding the Fourth Proportional to 1,476.60, 2,212.82 and 818.77

Step by Step Solution

1. Step 1: Write the proportion equation
   1,476.60 : 2,212.82 = 818.77 : x
2. Step 2: Convert to fraction form
   1,476.60/2,212.82 = 818.77/x
3. Step 3: Cross multiply
   1,476.60x = 2,212.82 × 818.77
4. Step 4: Simplify right side
   1,476.60x = 1,811,791.34
5. Step 5: Solve for x
   x = 1,811,791.34/1,476.60
6. Step 6: Final answer
   x = 1,227.00