Finding the Fourth Proportional to 12,071.62, 16,656.60 and 7,768.50

Step by Step Solution

1. Step 1: Write the proportion equation
   12,071.62 : 16,656.60 = 7,768.50 : x
2. Step 2: Convert to fraction form
   12,071.62/16,656.60 = 7,768.50/x
3. Step 3: Cross multiply
   12,071.62x = 16,656.60 × 7,768.50
4. Step 4: Simplify right side
   12,071.62x = 129,396,797.10
5. Step 5: Solve for x
   x = 129,396,797.10/12,071.62
6. Step 6: Final answer
   x = 10,719.09