Finding the Fourth Proportional to 1,445.93, 1,995.27 and 947.78

Step by Step Solution

1. Step 1: Write the proportion equation
   1,445.93 : 1,995.27 = 947.78 : x
2. Step 2: Convert to fraction form
   1,445.93/1,995.27 = 947.78/x
3. Step 3: Cross multiply
   1,445.93x = 1,995.27 × 947.78
4. Step 4: Simplify right side
   1,445.93x = 1,891,067.02
5. Step 5: Solve for x
   x = 1,891,067.02/1,445.93
6. Step 6: Final answer
   x = 1,307.86