Finding the Fourth Proportional to 1,216.67, 1,828.79 and 1,012.55

Step by Step Solution

1. Step 1: Write the proportion equation
   1,216.67 : 1,828.79 = 1,012.55 : x
2. Step 2: Convert to fraction form
   1,216.67/1,828.79 = 1,012.55/x
3. Step 3: Cross multiply
   1,216.67x = 1,828.79 × 1,012.55
4. Step 4: Simplify right side
   1,216.67x = 1,851,741.31
5. Step 5: Solve for x
   x = 1,851,741.31/1,216.67
6. Step 6: Final answer
   x = 1,521.97