Finding the Fourth Proportional to 1,507.43, 2,080.14 and 917.89

Step by Step Solution

1. Step 1: Write the proportion equation
   1,507.43 : 2,080.14 = 917.89 : x
2. Step 2: Convert to fraction form
   1,507.43/2,080.14 = 917.89/x
3. Step 3: Cross multiply
   1,507.43x = 2,080.14 × 917.89
4. Step 4: Simplify right side
   1,507.43x = 1,909,339.70
5. Step 5: Solve for x
   x = 1,909,339.70/1,507.43
6. Step 6: Final answer
   x = 1,266.62