Finding the Fourth Proportional to 1,118.56, 1,543.52 and 652.80

Step by Step Solution

1. Step 1: Write the proportion equation
   1,118.56 : 1,543.52 = 652.80 : x
2. Step 2: Convert to fraction form
   1,118.56/1,543.52 = 652.80/x
3. Step 3: Cross multiply
   1,118.56x = 1,543.52 × 652.80
4. Step 4: Simplify right side
   1,118.56x = 1,007,609.86
5. Step 5: Solve for x
   x = 1,007,609.86/1,118.56
6. Step 6: Final answer
   x = 900.81