Finding the Fourth Proportional to 139,868.56, 193,091.60 and 109,175.75

Step by Step Solution

1. Step 1: Write the proportion equation
   139,868.56 : 193,091.60 = 109,175.75 : x
2. Step 2: Convert to fraction form
   139,868.56/193,091.60 = 109,175.75/x
3. Step 3: Cross multiply
   139,868.56x = 193,091.60 × 109,175.75
4. Step 4: Simplify right side
   139,868.56x = 21,080,920,248.70
5. Step 5: Solve for x
   x = 21,080,920,248.70/139,868.56
6. Step 6: Final answer
   x = 150,719.51