Finding the Fourth Proportional to 31,145.79, 46,726.69 and 8,960.91

Step by Step Solution

1. Step 1: Write the proportion equation
   31,145.79 : 46,726.69 = 8,960.91 : x
2. Step 2: Convert to fraction form
   31,145.79/46,726.69 = 8,960.91/x
3. Step 3: Cross multiply
   31,145.79x = 46,726.69 × 8,960.91
4. Step 4: Simplify right side
   31,145.79x = 418,713,663.69
5. Step 5: Solve for x
   x = 418,713,663.69/31,145.79
6. Step 6: Final answer
   x = 13,443.67