Finding the Fourth Proportional to 1,509.86, 2,080.59 and 1,089.47

Step by Step Solution

1. Step 1: Write the proportion equation
   1,509.86 : 2,080.59 = 1,089.47 : x
2. Step 2: Convert to fraction form
   1,509.86/2,080.59 = 1,089.47/x
3. Step 3: Cross multiply
   1,509.86x = 2,080.59 × 1,089.47
4. Step 4: Simplify right side
   1,509.86x = 2,266,729.98
5. Step 5: Solve for x
   x = 2,266,729.98/1,509.86
6. Step 6: Final answer
   x = 1,501.29