Finding the Fourth Proportional to 1,118.58, 1,543.59 and 676.40

Step by Step Solution

1. Step 1: Write the proportion equation
   1,118.58 : 1,543.59 = 676.40 : x
2. Step 2: Convert to fraction form
   1,118.58/1,543.59 = 676.40/x
3. Step 3: Cross multiply
   1,118.58x = 1,543.59 × 676.40
4. Step 4: Simplify right side
   1,118.58x = 1,044,084.28
5. Step 5: Solve for x
   x = 1,044,084.28/1,118.58
6. Step 6: Final answer
   x = 933.40