Finding the Fourth Proportional to 2,171.32, 3,255.08 and 784.34

Step by Step Solution

1. Step 1: Write the proportion equation
   2,171.32 : 3,255.08 = 784.34 : x
2. Step 2: Convert to fraction form
   2,171.32/3,255.08 = 784.34/x
3. Step 3: Cross multiply
   2,171.32x = 3,255.08 × 784.34
4. Step 4: Simplify right side
   2,171.32x = 2,553,089.45
5. Step 5: Solve for x
   x = 2,553,089.45/2,171.32
6. Step 6: Final answer
   x = 1,175.82