Finding the Fourth Proportional to 92,976.78, 139,406.73 and 67,685.34

Step by Step Solution

1. Step 1: Write the proportion equation
   92,976.78 : 139,406.73 = 67,685.34 : x
2. Step 2: Convert to fraction form
   92,976.78/139,406.73 = 67,685.34/x
3. Step 3: Cross multiply
   92,976.78x = 139,406.73 × 67,685.34
4. Step 4: Simplify right side
   92,976.78x = 9,435,791,918.34
5. Step 5: Solve for x
   x = 9,435,791,918.34/92,976.78
6. Step 6: Final answer
   x = 101,485.47