Finding the Fourth Proportional to 391,870.33, 587,904.24 and 111,387.58

Step by Step Solution

1. Step 1: Write the proportion equation
   391,870.33 : 587,904.24 = 111,387.58 : x
2. Step 2: Convert to fraction form
   391,870.33/587,904.24 = 111,387.58/x
3. Step 3: Cross multiply
   391,870.33x = 587,904.24 × 111,387.58
4. Step 4: Simplify right side
   391,870.33x = 65,485,229,095.58
5. Step 5: Solve for x
   x = 65,485,229,095.58/391,870.33
6. Step 6: Final answer
   x = 167,109.44