Finding the Fourth Proportional to 150,139.86, 207,189.81 and 82,156.56

Step by Step Solution

1. Step 1: Write the proportion equation
   150,139.86 : 207,189.81 = 82,156.56 : x
2. Step 2: Convert to fraction form
   150,139.86/207,189.81 = 82,156.56/x
3. Step 3: Cross multiply
   150,139.86x = 207,189.81 × 82,156.56
4. Step 4: Simplify right side
   150,139.86x = 17,022,002,056.65
5. Step 5: Solve for x
   x = 17,022,002,056.65/150,139.86
6. Step 6: Final answer
   x = 113,374.30