Finding the Fourth Proportional to 105,900.88, 146,019.74 and 78,996.68

Step by Step Solution

1. Step 1: Write the proportion equation
   105,900.88 : 146,019.74 = 78,996.68 : x
2. Step 2: Convert to fraction form
   105,900.88/146,019.74 = 78,996.68/x
3. Step 3: Cross multiply
   105,900.88x = 146,019.74 × 78,996.68
4. Step 4: Simplify right side
   105,900.88x = 11,535,075,237.00
5. Step 5: Solve for x
   x = 11,535,075,237.00/105,900.88
6. Step 6: Final answer
   x = 108,923.32