Finding the Fourth Proportional to 3,561.16, 4,916.32 and 2,145.19

Step by Step Solution

1. Step 1: Write the proportion equation
   3,561.16 : 4,916.32 = 2,145.19 : x
2. Step 2: Convert to fraction form
   3,561.16/4,916.32 = 2,145.19/x
3. Step 3: Cross multiply
   3,561.16x = 4,916.32 × 2,145.19
4. Step 4: Simplify right side
   3,561.16x = 10,546,440.50
5. Step 5: Solve for x
   x = 10,546,440.50/3,561.16
6. Step 6: Final answer
   x = 2,961.52