Finding the Fourth Proportional to 12,720.53, 17,554.43 and 7,054.96

Step by Step Solution

1. Step 1: Write the proportion equation
   12,720.53 : 17,554.43 = 7,054.96 : x
2. Step 2: Convert to fraction form
   12,720.53/17,554.43 = 7,054.96/x
3. Step 3: Cross multiply
   12,720.53x = 17,554.43 × 7,054.96
4. Step 4: Simplify right side
   12,720.53x = 123,845,814.60
5. Step 5: Solve for x
   x = 123,845,814.60/12,720.53
6. Step 6: Final answer
   x = 9,735.90