Finding the Fourth Proportional to 1,404.23, 1,938.26 and 906.86

Step by Step Solution

1. Step 1: Write the proportion equation
   1,404.23 : 1,938.26 = 906.86 : x
2. Step 2: Convert to fraction form
   1,404.23/1,938.26 = 906.86/x
3. Step 3: Cross multiply
   1,404.23x = 1,938.26 × 906.86
4. Step 4: Simplify right side
   1,404.23x = 1,757,725.93
5. Step 5: Solve for x
   x = 1,757,725.93/1,404.23
6. Step 6: Final answer
   x = 1,251.74