Finding the Fourth Proportional to 2,621.76, 3,931.72 and 1,435.56

Step by Step Solution

1. Step 1: Write the proportion equation
   2,621.76 : 3,931.72 = 1,435.56 : x
2. Step 2: Convert to fraction form
   2,621.76/3,931.72 = 1,435.56/x
3. Step 3: Cross multiply
   2,621.76x = 3,931.72 × 1,435.56
4. Step 4: Simplify right side
   2,621.76x = 5,644,219.96
5. Step 5: Solve for x
   x = 5,644,219.96/2,621.76
6. Step 6: Final answer
   x = 2,152.84