Finding the Fourth Proportional to 9,188.56, 12,669.04 and 7,769.68

Step by Step Solution

1. Step 1: Write the proportion equation
   9,188.56 : 12,669.04 = 7,769.68 : x
2. Step 2: Convert to fraction form
   9,188.56/12,669.04 = 7,769.68/x
3. Step 3: Cross multiply
   9,188.56x = 12,669.04 × 7,769.68
4. Step 4: Simplify right side
   9,188.56x = 98,434,386.71
5. Step 5: Solve for x
   x = 98,434,386.71/9,188.56
6. Step 6: Final answer
   x = 10,712.71