Finding the Fourth Proportional to 151,389.81, 208,907.91 and 90,963

Step by Step Solution

1. Step 1: Write the proportion equation
   151,389.81 : 208,907.91 = 90,963 : x
2. Step 2: Convert to fraction form
   151,389.81/208,907.91 = 90,963/x
3. Step 3: Cross multiply
   151,389.81x = 208,907.91 × 90,963
4. Step 4: Simplify right side
   151,389.81x = 19,002,890,217.33
5. Step 5: Solve for x
   x = 19,002,890,217.33/151,389.81
6. Step 6: Final answer
   x = 125,522.91