Finding the Fourth Proportional to 2,783.84, 4,175.80 and 909.72

Step by Step Solution

1. Step 1: Write the proportion equation
   2,783.84 : 4,175.80 = 909.72 : x
2. Step 2: Convert to fraction form
   2,783.84/4,175.80 = 909.72/x
3. Step 3: Cross multiply
   2,783.84x = 4,175.80 × 909.72
4. Step 4: Simplify right side
   2,783.84x = 3,798,808.78
5. Step 5: Solve for x
   x = 3,798,808.78/2,783.84
6. Step 6: Final answer
   x = 1,364.59