Finding the Fourth Proportional to 1,485.06, 2,225.76 and 791.91

Step by Step Solution

1. Step 1: Write the proportion equation
   1,485.06 : 2,225.76 = 791.91 : x
2. Step 2: Convert to fraction form
   1,485.06/2,225.76 = 791.91/x
3. Step 3: Cross multiply
   1,485.06x = 2,225.76 × 791.91
4. Step 4: Simplify right side
   1,485.06x = 1,762,601.60
5. Step 5: Solve for x
   x = 1,762,601.60/1,485.06
6. Step 6: Final answer
   x = 1,186.89