Finding the Fourth Proportional to 1,077.06, 1,611.54 and 659.10

Step by Step Solution

1. Step 1: Write the proportion equation
   1,077.06 : 1,611.54 = 659.10 : x
2. Step 2: Convert to fraction form
   1,077.06/1,611.54 = 659.10/x
3. Step 3: Cross multiply
   1,077.06x = 1,611.54 × 659.10
4. Step 4: Simplify right side
   1,077.06x = 1,062,166.01
5. Step 5: Solve for x
   x = 1,062,166.01/1,077.06
6. Step 6: Final answer
   x = 986.17