Finding the Fourth Proportional to 108,679.59, 149,901.98 and 105,021.81

Step by Step Solution

1. Step 1: Write the proportion equation
   108,679.59 : 149,901.98 = 105,021.81 : x
2. Step 2: Convert to fraction form
   108,679.59/149,901.98 = 105,021.81/x
3. Step 3: Cross multiply
   108,679.59x = 149,901.98 × 105,021.81
4. Step 4: Simplify right side
   108,679.59x = 15,742,976,737.07
5. Step 5: Solve for x
   x = 15,742,976,737.07/108,679.59
6. Step 6: Final answer
   x = 144,856.79