Finding the Fourth Proportional to 105,422.97, 145,572.35 and 75,300.69

Step by Step Solution

1. Step 1: Write the proportion equation
   105,422.97 : 145,572.35 = 75,300.69 : x
2. Step 2: Convert to fraction form
   105,422.97/145,572.35 = 75,300.69/x
3. Step 3: Cross multiply
   105,422.97x = 145,572.35 × 75,300.69
4. Step 4: Simplify right side
   105,422.97x = 10,961,698,023.42
5. Step 5: Solve for x
   x = 10,961,698,023.42/105,422.97
6. Step 6: Final answer
   x = 103,978.27