Finding the Fourth Proportional to 12,720.83, 17,554.88 and 7,055.67

Step by Step Solution

1. Step 1: Write the proportion equation
   12,720.83 : 17,554.88 = 7,055.67 : x
2. Step 2: Convert to fraction form
   12,720.83/17,554.88 = 7,055.67/x
3. Step 3: Cross multiply
   12,720.83x = 17,554.88 × 7,055.67
4. Step 4: Simplify right side
   12,720.83x = 123,861,440.17
5. Step 5: Solve for x
   x = 123,861,440.17/12,720.83
6. Step 6: Final answer
   x = 9,736.90