Finding the Fourth Proportional to 9,789.56, 13,506.06 and 6,434.22

Step by Step Solution

1. Step 1: Write the proportion equation
   9,789.56 : 13,506.06 = 6,434.22 : x
2. Step 2: Convert to fraction form
   9,789.56/13,506.06 = 6,434.22/x
3. Step 3: Cross multiply
   9,789.56x = 13,506.06 × 6,434.22
4. Step 4: Simplify right side
   9,789.56x = 86,900,961.37
5. Step 5: Solve for x
   x = 86,900,961.37/9,789.56
6. Step 6: Final answer
   x = 8,876.90