Finding the Fourth Proportional to 256,996.80, 385,499.34 and 79,501.86

Step by Step Solution

1. Step 1: Write the proportion equation
   256,996.80 : 385,499.34 = 79,501.86 : x
2. Step 2: Convert to fraction form
   256,996.80/385,499.34 = 79,501.86/x
3. Step 3: Cross multiply
   256,996.80x = 385,499.34 × 79,501.86
4. Step 4: Simplify right side
   256,996.80x = 30,647,914,558.77
5. Step 5: Solve for x
   x = 30,647,914,558.77/256,996.80
6. Step 6: Final answer
   x = 119,254.07