Finding the Fourth Proportional to 1,619.69, 2,235.15 and 1,061.07

Step by Step Solution

1. Step 1: Write the proportion equation
   1,619.69 : 2,235.15 = 1,061.07 : x
2. Step 2: Convert to fraction form
   1,619.69/2,235.15 = 1,061.07/x
3. Step 3: Cross multiply
   1,619.69x = 2,235.15 × 1,061.07
4. Step 4: Simplify right side
   1,619.69x = 2,371,650.61
5. Step 5: Solve for x
   x = 2,371,650.61/1,619.69
6. Step 6: Final answer
   x = 1,464.27