Finding the Fourth Proportional to 1,357.92, 2,039.40 and 947.34

Step by Step Solution

1. Step 1: Write the proportion equation
   1,357.92 : 2,039.40 = 947.34 : x
2. Step 2: Convert to fraction form
   1,357.92/2,039.40 = 947.34/x
3. Step 3: Cross multiply
   1,357.92x = 2,039.40 × 947.34
4. Step 4: Simplify right side
   1,357.92x = 1,932,005.20
5. Step 5: Solve for x
   x = 1,932,005.20/1,357.92
6. Step 6: Final answer
   x = 1,422.77