Finding the Fourth Proportional to 2,152.60, 3,222.60 and 1,607.20

Step by Step Solution

1. Step 1: Write the proportion equation
   2,152.60 : 3,222.60 = 1,607.20 : x
2. Step 2: Convert to fraction form
   2,152.60/3,222.60 = 1,607.20/x
3. Step 3: Cross multiply
   2,152.60x = 3,222.60 × 1,607.20
4. Step 4: Simplify right side
   2,152.60x = 5,179,362.72
5. Step 5: Solve for x
   x = 5,179,362.72/2,152.60
6. Step 6: Final answer
   x = 2,406.10