Finding the Fourth Proportional to 103,519.82, 142,928.17 and 79,278.01

Step by Step Solution

1. Step 1: Write the proportion equation
   103,519.82 : 142,928.17 = 79,278.01 : x
2. Step 2: Convert to fraction form
   103,519.82/142,928.17 = 79,278.01/x
3. Step 3: Cross multiply
   103,519.82x = 142,928.17 × 79,278.01
4. Step 4: Simplify right side
   103,519.82x = 11,331,060,890.54
5. Step 5: Solve for x
   x = 11,331,060,890.54/103,519.82
6. Step 6: Final answer
   x = 109,457.89