Finding the Fourth Proportional to 1,507.76, 2,080.63 and 948.05

Step by Step Solution

1. Step 1: Write the proportion equation
   1,507.76 : 2,080.63 = 948.05 : x
2. Step 2: Convert to fraction form
   1,507.76/2,080.63 = 948.05/x
3. Step 3: Cross multiply
   1,507.76x = 2,080.63 × 948.05
4. Step 4: Simplify right side
   1,507.76x = 1,972,544.10
5. Step 5: Solve for x
   x = 1,972,544.10/1,507.76
6. Step 6: Final answer
   x = 1,308.26