Finding the Fourth Proportional to 1,361.48, 1,879.38 and 947.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,361.48 : 1,879.38 = 947.72 : x
2. Step 2: Convert to fraction form
   1,361.48/1,879.38 = 947.72/x
3. Step 3: Cross multiply
   1,361.48x = 1,879.38 × 947.72
4. Step 4: Simplify right side
   1,361.48x = 1,781,126.01
5. Step 5: Solve for x
   x = 1,781,126.01/1,361.48
6. Step 6: Final answer
   x = 1,308.23