Finding the Fourth Proportional to 258,819.51, 387,909.59 and 109,007.31

Step by Step Solution

1. Step 1: Write the proportion equation
   258,819.51 : 387,909.59 = 109,007.31 : x
2. Step 2: Convert to fraction form
   258,819.51/387,909.59 = 109,007.31/x
3. Step 3: Cross multiply
   258,819.51x = 387,909.59 × 109,007.31
4. Step 4: Simplify right side
   258,819.51x = 42,284,980,384.07
5. Step 5: Solve for x
   x = 42,284,980,384.07/258,819.51
6. Step 6: Final answer
   x = 163,376.33