Finding the Fourth Proportional to 1,632.12, 2,428.64 and 1,626.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,632.12 : 2,428.64 = 1,626.72 : x
2. Step 2: Convert to fraction form
   1,632.12/2,428.64 = 1,626.72/x
3. Step 3: Cross multiply
   1,632.12x = 2,428.64 × 1,626.72
4. Step 4: Simplify right side
   1,632.12x = 3,950,709.13
5. Step 5: Solve for x
   x = 3,950,709.13/1,632.12
6. Step 6: Final answer
   x = 2,420.60