Finding the Fourth Proportional to 1,045.31, 1,567.56 and 558.10

Step by Step Solution

1. Step 1: Write the proportion equation
   1,045.31 : 1,567.56 = 558.10 : x
2. Step 2: Convert to fraction form
   1,045.31/1,567.56 = 558.10/x
3. Step 3: Cross multiply
   1,045.31x = 1,567.56 × 558.10
4. Step 4: Simplify right side
   1,045.31x = 874,847.40
5. Step 5: Solve for x
   x = 874,847.40/1,045.31
6. Step 6: Final answer
   x = 836.93