Finding the Fourth Proportional to 1,439.61, 1,986.83 and 1,061.65

Step by Step Solution

1. Step 1: Write the proportion equation
   1,439.61 : 1,986.83 = 1,061.65 : x
2. Step 2: Convert to fraction form
   1,439.61/1,986.83 = 1,061.65/x
3. Step 3: Cross multiply
   1,439.61x = 1,986.83 × 1,061.65
4. Step 4: Simplify right side
   1,439.61x = 2,109,318.07
5. Step 5: Solve for x
   x = 2,109,318.07/1,439.61
6. Step 6: Final answer
   x = 1,465.20