Finding the Fourth Proportional to 139,857.77, 193,076.87 and 109,165.05

Step by Step Solution

1. Step 1: Write the proportion equation
   139,857.77 : 193,076.87 = 109,165.05 : x
2. Step 2: Convert to fraction form
   139,857.77/193,076.87 = 109,165.05/x
3. Step 3: Cross multiply
   139,857.77x = 193,076.87 × 109,165.05
4. Step 4: Simplify right side
   139,857.77x = 21,077,245,621.57
5. Step 5: Solve for x
   x = 21,077,245,621.57/139,857.77
6. Step 6: Final answer
   x = 150,704.86