Finding the Fourth Proportional to 139,585.16, 192,631.82 and 79,158.28

Step by Step Solution

1. Step 1: Write the proportion equation
   139,585.16 : 192,631.82 = 79,158.28 : x
2. Step 2: Convert to fraction form
   139,585.16/192,631.82 = 79,158.28/x
3. Step 3: Cross multiply
   139,585.16x = 192,631.82 × 79,158.28
4. Step 4: Simplify right side
   139,585.16x = 15,248,403,544.47
5. Step 5: Solve for x
   x = 15,248,403,544.47/139,585.16
6. Step 6: Final answer
   x = 109,240.86