Finding the Fourth Proportional to 109,366.72, 163,936.32 and 79,308.16

Step by Step Solution

1. Step 1: Write the proportion equation
   109,366.72 : 163,936.32 = 79,308.16 : x
2. Step 2: Convert to fraction form
   109,366.72/163,936.32 = 79,308.16/x
3. Step 3: Cross multiply
   109,366.72x = 163,936.32 × 79,308.16
4. Step 4: Simplify right side
   109,366.72x = 13,001,487,896.37
5. Step 5: Solve for x
   x = 13,001,487,896.37/109,366.72
6. Step 6: Final answer
   x = 118,879.75