Finding the Fourth Proportional to 2,087.06, 3,131.17 and 1,045.80

Step by Step Solution

1. Step 1: Write the proportion equation
   2,087.06 : 3,131.17 = 1,045.80 : x
2. Step 2: Convert to fraction form
   2,087.06/3,131.17 = 1,045.80/x
3. Step 3: Cross multiply
   2,087.06x = 3,131.17 × 1,045.80
4. Step 4: Simplify right side
   2,087.06x = 3,274,580.85
5. Step 5: Solve for x
   x = 3,274,580.85/2,087.06
6. Step 6: Final answer
   x = 1,569.00