Finding the Fourth Proportional to 13,019.96, 17,964.42 and 7,713.86

Step by Step Solution

1. Step 1: Write the proportion equation
   13,019.96 : 17,964.42 = 7,713.86 : x
2. Step 2: Convert to fraction form
   13,019.96/17,964.42 = 7,713.86/x
3. Step 3: Cross multiply
   13,019.96x = 17,964.42 × 7,713.86
4. Step 4: Simplify right side
   13,019.96x = 138,574,931.04
5. Step 5: Solve for x
   x = 138,574,931.04/13,019.96
6. Step 6: Final answer
   x = 10,643.27