Finding the Fourth Proportional to 1,598.78, 2,397.86 and 558.59

Step by Step Solution

1. Step 1: Write the proportion equation
   1,598.78 : 2,397.86 = 558.59 : x
2. Step 2: Convert to fraction form
   1,598.78/2,397.86 = 558.59/x
3. Step 3: Cross multiply
   1,598.78x = 2,397.86 × 558.59
4. Step 4: Simplify right side
   1,598.78x = 1,339,410.02
5. Step 5: Solve for x
   x = 1,339,410.02/1,598.78
6. Step 6: Final answer
   x = 837.77