Finding the Fourth Proportional to 13,109.17, 19,663.71 and 5,317.96

Step by Step Solution

1. Step 1: Write the proportion equation
   13,109.17 : 19,663.71 = 5,317.96 : x
2. Step 2: Convert to fraction form
   13,109.17/19,663.71 = 5,317.96/x
3. Step 3: Cross multiply
   13,109.17x = 19,663.71 × 5,317.96
4. Step 4: Simplify right side
   13,109.17x = 104,570,823.23
5. Step 5: Solve for x
   x = 104,570,823.23/13,109.17
6. Step 6: Final answer
   x = 7,976.92