Finding the Fourth Proportional to 1,100.07, 1,517.70 and 820.52

Step by Step Solution

1. Step 1: Write the proportion equation
   1,100.07 : 1,517.70 = 820.52 : x
2. Step 2: Convert to fraction form
   1,100.07/1,517.70 = 820.52/x
3. Step 3: Cross multiply
   1,100.07x = 1,517.70 × 820.52
4. Step 4: Simplify right side
   1,100.07x = 1,245,303.20
5. Step 5: Solve for x
   x = 1,245,303.20/1,100.07
6. Step 6: Final answer
   x = 1,132.02