Finding the Fourth Proportional to 3,555.30, 5,335.86 and 2,516.31

Step by Step Solution

1. Step 1: Write the proportion equation
   3,555.30 : 5,335.86 = 2,516.31 : x
2. Step 2: Convert to fraction form
   3,555.30/5,335.86 = 2,516.31/x
3. Step 3: Cross multiply
   3,555.30x = 5,335.86 × 2,516.31
4. Step 4: Simplify right side
   3,555.30x = 13,426,665.30
5. Step 5: Solve for x
   x = 13,426,665.30/3,555.30
6. Step 6: Final answer
   x = 3,776.52