Finding the Fourth Proportional to 1,507.05, 2,079.72 and 917.46

Step by Step Solution

1. Step 1: Write the proportion equation
   1,507.05 : 2,079.72 = 917.46 : x
2. Step 2: Convert to fraction form
   1,507.05/2,079.72 = 917.46/x
3. Step 3: Cross multiply
   1,507.05x = 2,079.72 × 917.46
4. Step 4: Simplify right side
   1,507.05x = 1,908,059.91
5. Step 5: Solve for x
   x = 1,908,059.91/1,507.05
6. Step 6: Final answer
   x = 1,266.09