Finding the Fourth Proportional to 103,673, 143,086.02 and 78,478.76

Step by Step Solution

1. Step 1: Write the proportion equation
   103,673 : 143,086.02 = 78,478.76 : x
2. Step 2: Convert to fraction form
   103,673/143,086.02 = 78,478.76/x
3. Step 3: Cross multiply
   103,673x = 143,086.02 × 78,478.76
4. Step 4: Simplify right side
   103,673x = 11,229,213,422.94
5. Step 5: Solve for x
   x = 11,229,213,422.94/103,673
6. Step 6: Final answer
   x = 108,313.77