Finding the Fourth Proportional to 2,383.72, 3,573.45 and 1,213.07

Step by Step Solution

1. Step 1: Write the proportion equation
   2,383.72 : 3,573.45 = 1,213.07 : x
2. Step 2: Convert to fraction form
   2,383.72/3,573.45 = 1,213.07/x
3. Step 3: Cross multiply
   2,383.72x = 3,573.45 × 1,213.07
4. Step 4: Simplify right side
   2,383.72x = 4,334,827.12
5. Step 5: Solve for x
   x = 4,334,827.12/2,383.72
6. Step 6: Final answer
   x = 1,818.52