Finding the Fourth Proportional to 151,390.37, 208,908.69 and 90,963.56

Step by Step Solution

1. Step 1: Write the proportion equation
   151,390.37 : 208,908.69 = 90,963.56 : x
2. Step 2: Convert to fraction form
   151,390.37/208,908.69 = 90,963.56/x
3. Step 3: Cross multiply
   151,390.37x = 208,908.69 × 90,963.56
4. Step 4: Simplify right side
   151,390.37x = 19,003,078,338.49
5. Step 5: Solve for x
   x = 19,003,078,338.49/151,390.37
6. Step 6: Final answer
   x = 125,523.69