Finding the Fourth Proportional to 2,513.12, 3,776.96 and 1,215.50

Step by Step Solution

1. Step 1: Write the proportion equation
   2,513.12 : 3,776.96 = 1,215.50 : x
2. Step 2: Convert to fraction form
   2,513.12/3,776.96 = 1,215.50/x
3. Step 3: Cross multiply
   2,513.12x = 3,776.96 × 1,215.50
4. Step 4: Simplify right side
   2,513.12x = 4,590,894.88
5. Step 5: Solve for x
   x = 4,590,894.88/2,513.12
6. Step 6: Final answer
   x = 1,826.77