Finding the Fourth Proportional to 2,641.60, 3,956.72 and 2,152.32

Step by Step Solution

1. Step 1: Write the proportion equation
   2,641.60 : 3,956.72 = 2,152.32 : x
2. Step 2: Convert to fraction form
   2,641.60/3,956.72 = 2,152.32/x
3. Step 3: Cross multiply
   2,641.60x = 3,956.72 × 2,152.32
4. Step 4: Simplify right side
   2,641.60x = 8,516,127.59
5. Step 5: Solve for x
   x = 8,516,127.59/2,641.60
6. Step 6: Final answer
   x = 3,223.85