Finding the Fourth Proportional to 103,928.99, 143,411.29 and 76,719.56

Step by Step Solution

1. Step 1: Write the proportion equation
   103,928.99 : 143,411.29 = 76,719.56 : x
2. Step 2: Convert to fraction form
   103,928.99/143,411.29 = 76,719.56/x
3. Step 3: Cross multiply
   103,928.99x = 143,411.29 × 76,719.56
4. Step 4: Simplify right side
   103,928.99x = 11,002,450,158.98
5. Step 5: Solve for x
   x = 11,002,450,158.98/103,928.99
6. Step 6: Final answer
   x = 105,865.08