Finding the Fourth Proportional to 1,404.12, 1,937.58 and 906.78

Step by Step Solution

1. Step 1: Write the proportion equation
   1,404.12 : 1,937.58 = 906.78 : x
2. Step 2: Convert to fraction form
   1,404.12/1,937.58 = 906.78/x
3. Step 3: Cross multiply
   1,404.12x = 1,937.58 × 906.78
4. Step 4: Simplify right side
   1,404.12x = 1,756,958.79
5. Step 5: Solve for x
   x = 1,756,958.79/1,404.12
6. Step 6: Final answer
   x = 1,251.29