Finding the Fourth Proportional to 258,878.62, 388,468.86 and 109,109.62

Step by Step Solution

1. Step 1: Write the proportion equation
   258,878.62 : 388,468.86 = 109,109.62 : x
2. Step 2: Convert to fraction form
   258,878.62/388,468.86 = 109,109.62/x
3. Step 3: Cross multiply
   258,878.62x = 388,468.86 × 109,109.62
4. Step 4: Simplify right side
   258,878.62x = 42,385,689,696.43
5. Step 5: Solve for x
   x = 42,385,689,696.43/258,878.62
6. Step 6: Final answer
   x = 163,728.04