Finding the Fourth Proportional to 114,989.88, 158,666.28 and 105,688.50

Step by Step Solution

1. Step 1: Write the proportion equation
   114,989.88 : 158,666.28 = 105,688.50 : x
2. Step 2: Convert to fraction form
   114,989.88/158,666.28 = 105,688.50/x
3. Step 3: Cross multiply
   114,989.88x = 158,666.28 × 105,688.50
4. Step 4: Simplify right side
   114,989.88x = 16,769,200,604.67
5. Step 5: Solve for x
   x = 16,769,200,604.67/114,989.88
6. Step 6: Final answer
   x = 145,831.97