Finding the Fourth Proportional to 256,705.38, 385,069 and 79,208.46

Step by Step Solution

1. Step 1: Write the proportion equation
   256,705.38 : 385,069 = 79,208.46 : x
2. Step 2: Convert to fraction form
   256,705.38/385,069 = 79,208.46/x
3. Step 3: Cross multiply
   256,705.38x = 385,069 × 79,208.46
4. Step 4: Simplify right side
   256,705.38x = 30,500,722,483.74
5. Step 5: Solve for x
   x = 30,500,722,483.74/256,705.38
6. Step 6: Final answer
   x = 118,816.06