Finding the Fourth Proportional to 238,870.81, 358,353.15 and 78,940.27

Step by Step Solution

1. Step 1: Write the proportion equation
   238,870.81 : 358,353.15 = 78,940.27 : x
2. Step 2: Convert to fraction form
   238,870.81/358,353.15 = 78,940.27/x
3. Step 3: Cross multiply
   238,870.81x = 358,353.15 × 78,940.27
4. Step 4: Simplify right side
   238,870.81x = 28,288,494,416.35
5. Step 5: Solve for x
   x = 28,288,494,416.35/238,870.81
6. Step 6: Final answer
   x = 118,425.92