Finding the Fourth Proportional to 3,853.34, 5,780.73 and 1,221.51

Step by Step Solution

1. Step 1: Write the proportion equation
   3,853.34 : 5,780.73 = 1,221.51 : x
2. Step 2: Convert to fraction form
   3,853.34/5,780.73 = 1,221.51/x
3. Step 3: Cross multiply
   3,853.34x = 5,780.73 × 1,221.51
4. Step 4: Simplify right side
   3,853.34x = 7,061,219.50
5. Step 5: Solve for x
   x = 7,061,219.50/3,853.34
6. Step 6: Final answer
   x = 1,832.49