Finding the Fourth Proportional to 257,275.57, 385,950.72 and 79,796.88

Step by Step Solution

1. Step 1: Write the proportion equation
   257,275.57 : 385,950.72 = 79,796.88 : x
2. Step 2: Convert to fraction form
   257,275.57/385,950.72 = 79,796.88/x
3. Step 3: Cross multiply
   257,275.57x = 385,950.72 × 79,796.88
4. Step 4: Simplify right side
   257,275.57x = 30,797,663,289.75
5. Step 5: Solve for x
   x = 30,797,663,289.75/257,275.57
6. Step 6: Final answer
   x = 119,706.91