Finding the Fourth Proportional to 1,055.09, 1,570.51 and 1,039.50

Step by Step Solution

1. Step 1: Write the proportion equation
   1,055.09 : 1,570.51 = 1,039.50 : x
2. Step 2: Convert to fraction form
   1,055.09/1,570.51 = 1,039.50/x
3. Step 3: Cross multiply
   1,055.09x = 1,570.51 × 1,039.50
4. Step 4: Simplify right side
   1,055.09x = 1,632,545.15
5. Step 5: Solve for x
   x = 1,632,545.15/1,055.09
6. Step 6: Final answer
   x = 1,547.30