Finding the Fourth Proportional to 259,866.72, 389,837 and 79,967.04

Step by Step Solution

1. Step 1: Write the proportion equation
   259,866.72 : 389,837 = 79,967.04 : x
2. Step 2: Convert to fraction form
   259,866.72/389,837 = 79,967.04/x
3. Step 3: Cross multiply
   259,866.72x = 389,837 × 79,967.04
4. Step 4: Simplify right side
   259,866.72x = 31,174,110,972.48
5. Step 5: Solve for x
   x = 31,174,110,972.48/259,866.72
6. Step 6: Final answer
   x = 119,961.92