Finding the Fourth Proportional to 108,728.10, 163,092.15 and 108,728.10

Step by Step Solution

1. Step 1: Write the proportion equation
   108,728.10 : 163,092.15 = 108,728.10 : x
2. Step 2: Convert to fraction form
   108,728.10/163,092.15 = 108,728.10/x
3. Step 3: Cross multiply
   108,728.10x = 163,092.15 × 108,728.10
4. Step 4: Simplify right side
   108,728.10x = 17,732,699,594.42
5. Step 5: Solve for x
   x = 17,732,699,594.42/108,728.10
6. Step 6: Final answer
   x = 163,092.15