Finding the Fourth Proportional to 139,858.77, 193,078.25 and 109,166.05

Step by Step Solution

1. Step 1: Write the proportion equation
   139,858.77 : 193,078.25 = 109,166.05 : x
2. Step 2: Convert to fraction form
   139,858.77/193,078.25 = 109,166.05/x
3. Step 3: Cross multiply
   139,858.77x = 193,078.25 × 109,166.05
4. Step 4: Simplify right side
   139,858.77x = 21,077,589,893.41
5. Step 5: Solve for x
   x = 21,077,589,893.41/139,858.77
6. Step 6: Final answer
   x = 150,706.24