Finding the Fourth Proportional to 2,042.72, 3,060.12 and 1,221.64

Step by Step Solution

1. Step 1: Write the proportion equation
   2,042.72 : 3,060.12 = 1,221.64 : x
2. Step 2: Convert to fraction form
   2,042.72/3,060.12 = 1,221.64/x
3. Step 3: Cross multiply
   2,042.72x = 3,060.12 × 1,221.64
4. Step 4: Simplify right side
   2,042.72x = 3,738,365.00
5. Step 5: Solve for x
   x = 3,738,365.00/2,042.72
6. Step 6: Final answer
   x = 1,830.09