Finding the Fourth Proportional to 2,870.54, 4,302.21 and 1,225.16

Step by Step Solution

1. Step 1: Write the proportion equation
   2,870.54 : 4,302.21 = 1,225.16 : x
2. Step 2: Convert to fraction form
   2,870.54/4,302.21 = 1,225.16/x
3. Step 3: Cross multiply
   2,870.54x = 4,302.21 × 1,225.16
4. Step 4: Simplify right side
   2,870.54x = 5,270,894.82
5. Step 5: Solve for x
   x = 5,270,894.82/2,870.54
6. Step 6: Final answer
   x = 1,836.20