Finding the Fourth Proportional to 13,019.12, 17,961.72 and 7,426.88

Step by Step Solution

1. Step 1: Write the proportion equation
   13,019.12 : 17,961.72 = 7,426.88 : x
2. Step 2: Convert to fraction form
   13,019.12/17,961.72 = 7,426.88/x
3. Step 3: Cross multiply
   13,019.12x = 17,961.72 × 7,426.88
4. Step 4: Simplify right side
   13,019.12x = 133,399,539.03
5. Step 5: Solve for x
   x = 133,399,539.03/13,019.12
6. Step 6: Final answer
   x = 10,246.43