Finding the Fourth Proportional to 911.86, 1,365.73 and 747.83

Step by Step Solution

1. Step 1: Write the proportion equation
   911.86 : 1,365.73 = 747.83 : x
2. Step 2: Convert to fraction form
   911.86/1,365.73 = 747.83/x
3. Step 3: Cross multiply
   911.86x = 1,365.73 × 747.83
4. Step 4: Simplify right side
   911.86x = 1,021,333.87
5. Step 5: Solve for x
   x = 1,021,333.87/911.86
6. Step 6: Final answer
   x = 1,120.06