Finding the Fourth Proportional to 1,216.03, 1,823.89 and 557.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,216.03 : 1,823.89 = 557.72 : x
2. Step 2: Convert to fraction form
   1,216.03/1,823.89 = 557.72/x
3. Step 3: Cross multiply
   1,216.03x = 1,823.89 × 557.72
4. Step 4: Simplify right side
   1,216.03x = 1,017,219.93
5. Step 5: Solve for x
   x = 1,017,219.93/1,216.03
6. Step 6: Final answer
   x = 836.51