Finding the Fourth Proportional to 257,072.72, 385,628.52 and 79,598.48

Step by Step Solution

1. Step 1: Write the proportion equation
   257,072.72 : 385,628.52 = 79,598.48 : x
2. Step 2: Convert to fraction form
   257,072.72/385,628.52 = 79,598.48/x
3. Step 3: Cross multiply
   257,072.72x = 385,628.52 × 79,598.48
4. Step 4: Simplify right side
   257,072.72x = 30,695,444,036.65
5. Step 5: Solve for x
   x = 30,695,444,036.65/257,072.72
6. Step 6: Final answer
   x = 119,403.74