Finding the Fourth Proportional to 151,391.81, 208,910.67 and 90,965

Step by Step Solution

1. Step 1: Write the proportion equation
   151,391.81 : 208,910.67 = 90,965 : x
2. Step 2: Convert to fraction form
   151,391.81/208,910.67 = 90,965/x
3. Step 3: Cross multiply
   151,391.81x = 208,910.67 × 90,965
4. Step 4: Simplify right side
   151,391.81x = 19,003,559,096.55
5. Step 5: Solve for x
   x = 19,003,559,096.55/151,391.81
6. Step 6: Final answer
   x = 125,525.67