Finding the Fourth Proportional to 256,897.98, 385,383.89 and 79,418.84

Step by Step Solution

1. Step 1: Write the proportion equation
   256,897.98 : 385,383.89 = 79,418.84 : x
2. Step 2: Convert to fraction form
   256,897.98/385,383.89 = 79,418.84/x
3. Step 3: Cross multiply
   256,897.98x = 385,383.89 × 79,418.84
4. Step 4: Simplify right side
   256,897.98x = 30,606,739,174.47
5. Step 5: Solve for x
   x = 30,606,739,174.47/256,897.98
6. Step 6: Final answer
   x = 119,139.66