Finding the Fourth Proportional to 2,225.12, 3,070.50 and 1,230.42

Step by Step Solution

1. Step 1: Write the proportion equation
   2,225.12 : 3,070.50 = 1,230.42 : x
2. Step 2: Convert to fraction form
   2,225.12/3,070.50 = 1,230.42/x
3. Step 3: Cross multiply
   2,225.12x = 3,070.50 × 1,230.42
4. Step 4: Simplify right side
   2,225.12x = 3,778,004.61
5. Step 5: Solve for x
   x = 3,778,004.61/2,225.12
6. Step 6: Final answer
   x = 1,697.89