Finding the Fourth Proportional to 258,925.06, 388,538.55 and 109,156.18

Step by Step Solution

1. Step 1: Write the proportion equation
   258,925.06 : 388,538.55 = 109,156.18 : x
2. Step 2: Convert to fraction form
   258,925.06/388,538.55 = 109,156.18/x
3. Step 3: Cross multiply
   258,925.06x = 388,538.55 × 109,156.18
4. Step 4: Simplify right side
   258,925.06x = 42,411,383,900.74
5. Step 5: Solve for x
   x = 42,411,383,900.74/258,925.06
6. Step 6: Final answer
   x = 163,797.91