Finding the Fourth Proportional to 256,623.35, 384,986.25 and 79,123.59

Step by Step Solution

1. Step 1: Write the proportion equation
   256,623.35 : 384,986.25 = 79,123.59 : x
2. Step 2: Convert to fraction form
   256,623.35/384,986.25 = 79,123.59/x
3. Step 3: Cross multiply
   256,623.35x = 384,986.25 × 79,123.59
4. Step 4: Simplify right side
   256,623.35x = 30,461,494,200.64
5. Step 5: Solve for x
   x = 30,461,494,200.64/256,623.35
6. Step 6: Final answer
   x = 118,701.18