Finding the Fourth Proportional to 108,686.10, 163,029.15 and 108,686.10

Step by Step Solution

1. Step 1: Write the proportion equation
   108,686.10 : 163,029.15 = 108,686.10 : x
2. Step 2: Convert to fraction form
   108,686.10/163,029.15 = 108,686.10/x
3. Step 3: Cross multiply
   108,686.10x = 163,029.15 × 108,686.10
4. Step 4: Simplify right side
   108,686.10x = 17,719,002,499.82
5. Step 5: Solve for x
   x = 17,719,002,499.82/108,686.10
6. Step 6: Final answer
   x = 163,029.15