Finding the Fourth Proportional to 1,117.89, 1,676.79 and 570.06

Step by Step Solution

1. Step 1: Write the proportion equation
   1,117.89 : 1,676.79 = 570.06 : x
2. Step 2: Convert to fraction form
   1,117.89/1,676.79 = 570.06/x
3. Step 3: Cross multiply
   1,117.89x = 1,676.79 × 570.06
4. Step 4: Simplify right side
   1,117.89x = 955,870.91
5. Step 5: Solve for x
   x = 955,870.91/1,117.89
6. Step 6: Final answer
   x = 855.07