Finding the Fourth Proportional to 1,100.67, 1,518.93 and 680.93

Step by Step Solution

1. Step 1: Write the proportion equation
   1,100.67 : 1,518.93 = 680.93 : x
2. Step 2: Convert to fraction form
   1,100.67/1,518.93 = 680.93/x
3. Step 3: Cross multiply
   1,100.67x = 1,518.93 × 680.93
4. Step 4: Simplify right side
   1,100.67x = 1,034,285.00
5. Step 5: Solve for x
   x = 1,034,285.00/1,100.67
6. Step 6: Final answer
   x = 939.69