Finding the Fourth Proportional to 2,603.96, 3,905.33 and 1,215.98

Step by Step Solution

1. Step 1: Write the proportion equation
   2,603.96 : 3,905.33 = 1,215.98 : x
2. Step 2: Convert to fraction form
   2,603.96/3,905.33 = 1,215.98/x
3. Step 3: Cross multiply
   2,603.96x = 3,905.33 × 1,215.98
4. Step 4: Simplify right side
   2,603.96x = 4,748,777.57
5. Step 5: Solve for x
   x = 4,748,777.57/2,603.96
6. Step 6: Final answer
   x = 1,823.68