Finding the Fourth Proportional to 265,768.24, 398,584.32 and 78,736

Step by Step Solution

1. Step 1: Write the proportion equation
   265,768.24 : 398,584.32 = 78,736 : x
2. Step 2: Convert to fraction form
   265,768.24/398,584.32 = 78,736/x
3. Step 3: Cross multiply
   265,768.24x = 398,584.32 × 78,736
4. Step 4: Simplify right side
   265,768.24x = 31,382,935,019.52
5. Step 5: Solve for x
   x = 31,382,935,019.52/265,768.24
6. Step 6: Final answer
   x = 118,083.84