Finding the Fourth Proportional to 2,099.52, 3,145.50 and 1,221.48

Step by Step Solution

1. Step 1: Write the proportion equation
   2,099.52 : 3,145.50 = 1,221.48 : x
2. Step 2: Convert to fraction form
   2,099.52/3,145.50 = 1,221.48/x
3. Step 3: Cross multiply
   2,099.52x = 3,145.50 × 1,221.48
4. Step 4: Simplify right side
   2,099.52x = 3,842,165.34
5. Step 5: Solve for x
   x = 3,842,165.34/2,099.52
6. Step 6: Final answer
   x = 1,830.02