Finding the Fourth Proportional to 2,225.20, 3,070.80 and 1,230.50

Step by Step Solution

1. Step 1: Write the proportion equation
   2,225.20 : 3,070.80 = 1,230.50 : x
2. Step 2: Convert to fraction form
   2,225.20/3,070.80 = 1,230.50/x
3. Step 3: Cross multiply
   2,225.20x = 3,070.80 × 1,230.50
4. Step 4: Simplify right side
   2,225.20x = 3,778,597.89
5. Step 5: Solve for x
   x = 3,778,597.89/2,225.20
6. Step 6: Final answer
   x = 1,698.09