Finding the Fourth Proportional to 1,404.57, 2,106.78 and 671.93

Step by Step Solution

1. Step 1: Write the proportion equation
   1,404.57 : 2,106.78 = 671.93 : x
2. Step 2: Convert to fraction form
   1,404.57/2,106.78 = 671.93/x
3. Step 3: Cross multiply
   1,404.57x = 2,106.78 × 671.93
4. Step 4: Simplify right side
   1,404.57x = 1,415,598.15
5. Step 5: Solve for x
   x = 1,415,598.15/1,404.57
6. Step 6: Final answer
   x = 1,007.85