Finding the Fourth Proportional to 1,288.02, 1,933.29 and 557.85

Step by Step Solution

1. Step 1: Write the proportion equation
   1,288.02 : 1,933.29 = 557.85 : x
2. Step 2: Convert to fraction form
   1,288.02/1,933.29 = 557.85/x
3. Step 3: Cross multiply
   1,288.02x = 1,933.29 × 557.85
4. Step 4: Simplify right side
   1,288.02x = 1,078,485.83
5. Step 5: Solve for x
   x = 1,078,485.83/1,288.02
6. Step 6: Final answer
   x = 837.32