Finding the Fourth Proportional to 1,620.30, 2,236.17 and 1,061.07

Step by Step Solution

1. Step 1: Write the proportion equation
   1,620.30 : 2,236.17 = 1,061.07 : x
2. Step 2: Convert to fraction form
   1,620.30/2,236.17 = 1,061.07/x
3. Step 3: Cross multiply
   1,620.30x = 2,236.17 × 1,061.07
4. Step 4: Simplify right side
   1,620.30x = 2,372,732.90
5. Step 5: Solve for x
   x = 2,372,732.90/1,620.30
6. Step 6: Final answer
   x = 1,464.38