Finding the Fourth Proportional to 105,469.86, 145,397.03 and 75,202.72

Step by Step Solution

1. Step 1: Write the proportion equation
   105,469.86 : 145,397.03 = 75,202.72 : x
2. Step 2: Convert to fraction form
   105,469.86/145,397.03 = 75,202.72/x
3. Step 3: Cross multiply
   105,469.86x = 145,397.03 × 75,202.72
4. Step 4: Simplify right side
   105,469.86x = 10,934,252,135.92
5. Step 5: Solve for x
   x = 10,934,252,135.92/105,469.86
6. Step 6: Final answer
   x = 103,671.82