Finding the Fourth Proportional to 105,872.77, 158,047.59 and 90,716.69

Step by Step Solution

1. Step 1: Write the proportion equation
   105,872.77 : 158,047.59 = 90,716.69 : x
2. Step 2: Convert to fraction form
   105,872.77/158,047.59 = 90,716.69/x
3. Step 3: Cross multiply
   105,872.77x = 158,047.59 × 90,716.69
4. Step 4: Simplify right side
   105,872.77x = 14,337,553,663.83
5. Step 5: Solve for x
   x = 14,337,553,663.83/105,872.77
6. Step 6: Final answer
   x = 135,422.49