Finding the Fourth Proportional to 1,507.71, 2,080.71 and 947.97

Step by Step Solution

1. Step 1: Write the proportion equation
   1,507.71 : 2,080.71 = 947.97 : x
2. Step 2: Convert to fraction form
   1,507.71/2,080.71 = 947.97/x
3. Step 3: Cross multiply
   1,507.71x = 2,080.71 × 947.97
4. Step 4: Simplify right side
   1,507.71x = 1,972,435.52
5. Step 5: Solve for x
   x = 1,972,435.52/1,507.71
6. Step 6: Final answer
   x = 1,308.23