Finding the Fourth Proportional to 1,406.52, 1,940.63 and 909.45

Step by Step Solution

1. Step 1: Write the proportion equation
   1,406.52 : 1,940.63 = 909.45 : x
2. Step 2: Convert to fraction form
   1,406.52/1,940.63 = 909.45/x
3. Step 3: Cross multiply
   1,406.52x = 1,940.63 × 909.45
4. Step 4: Simplify right side
   1,406.52x = 1,764,901.41
5. Step 5: Solve for x
   x = 1,764,901.41/1,406.52
6. Step 6: Final answer
   x = 1,254.80