Finding the Fourth Proportional to 139,062.70, 191,905.41 and 78,633.34

Step by Step Solution

1. Step 1: Write the proportion equation
   139,062.70 : 191,905.41 = 78,633.34 : x
2. Step 2: Convert to fraction form
   139,062.70/191,905.41 = 78,633.34/x
3. Step 3: Cross multiply
   139,062.70x = 191,905.41 × 78,633.34
4. Step 4: Simplify right side
   139,062.70x = 15,090,163,352.37
5. Step 5: Solve for x
   x = 15,090,163,352.37/139,062.70
6. Step 6: Final answer
   x = 108,513.38