Finding the Fourth Proportional to 1,730.79, 2,589.65 and 1,061.30

Step by Step Solution

1. Step 1: Write the proportion equation
   1,730.79 : 2,589.65 = 1,061.30 : x
2. Step 2: Convert to fraction form
   1,730.79/2,589.65 = 1,061.30/x
3. Step 3: Cross multiply
   1,730.79x = 2,589.65 × 1,061.30
4. Step 4: Simplify right side
   1,730.79x = 2,748,397.71
5. Step 5: Solve for x
   x = 2,748,397.71/1,730.79
6. Step 6: Final answer
   x = 1,587.94