Finding the Fourth Proportional to 105,423.22, 145,572.69 and 75,300.94

Step by Step Solution

1. Step 1: Write the proportion equation
   105,423.22 : 145,572.69 = 75,300.94 : x
2. Step 2: Convert to fraction form
   105,423.22/145,572.69 = 75,300.94/x
3. Step 3: Cross multiply
   105,423.22x = 145,572.69 × 75,300.94
4. Step 4: Simplify right side
   105,423.22x = 10,961,760,395.33
5. Step 5: Solve for x
   x = 10,961,760,395.33/105,423.22
6. Step 6: Final answer
   x = 103,978.61