Finding the Fourth Proportional to 139,853.72, 193,021.54 and 82,507.28

Step by Step Solution

1. Step 1: Write the proportion equation
   139,853.72 : 193,021.54 = 82,507.28 : x
2. Step 2: Convert to fraction form
   139,853.72/193,021.54 = 82,507.28/x
3. Step 3: Cross multiply
   139,853.72x = 193,021.54 × 82,507.28
4. Step 4: Simplify right side
   139,853.72x = 15,925,681,075.44
5. Step 5: Solve for x
   x = 15,925,681,075.44/139,853.72
6. Step 6: Final answer
   x = 113,873.84