Finding the Fourth Proportional to 256,868.63, 385,257.83 and 79,377.18

Step by Step Solution

1. Step 1: Write the proportion equation
   256,868.63 : 385,257.83 = 79,377.18 : x
2. Step 2: Convert to fraction form
   256,868.63/385,257.83 = 79,377.18/x
3. Step 3: Cross multiply
   256,868.63x = 385,257.83 × 79,377.18
4. Step 4: Simplify right side
   256,868.63x = 30,580,680,118.32
5. Step 5: Solve for x
   x = 30,580,680,118.32/256,868.63
6. Step 6: Final answer
   x = 119,051.83