Finding the Fourth Proportional to 256,521.50, 384,833.28 and 79,020.94

Step by Step Solution

1. Step 1: Write the proportion equation
   256,521.50 : 384,833.28 = 79,020.94 : x
2. Step 2: Convert to fraction form
   256,521.50/384,833.28 = 79,020.94/x
3. Step 3: Cross multiply
   256,521.50x = 384,833.28 × 79,020.94
4. Step 4: Simplify right side
   256,521.50x = 30,409,885,604.72
5. Step 5: Solve for x
   x = 30,409,885,604.72/256,521.50
6. Step 6: Final answer
   x = 118,547.12