Finding the Fourth Proportional to 13,019.58, 17,963.91 and 7,713.47

Step by Step Solution

1. Step 1: Write the proportion equation
   13,019.58 : 17,963.91 = 7,713.47 : x
2. Step 2: Convert to fraction form
   13,019.58/17,963.91 = 7,713.47/x
3. Step 3: Cross multiply
   13,019.58x = 17,963.91 × 7,713.47
4. Step 4: Simplify right side
   13,019.58x = 138,564,125.78
5. Step 5: Solve for x
   x = 138,564,125.78/13,019.58
6. Step 6: Final answer
   x = 10,642.75