Finding the Fourth Proportional to 105,978.47, 146,150.07 and 69,615.74

Step by Step Solution

1. Step 1: Write the proportion equation
   105,978.47 : 146,150.07 = 69,615.74 : x
2. Step 2: Convert to fraction form
   105,978.47/146,150.07 = 69,615.74/x
3. Step 3: Cross multiply
   105,978.47x = 146,150.07 × 69,615.74
4. Step 4: Simplify right side
   105,978.47x = 10,174,345,274.10
5. Step 5: Solve for x
   x = 10,174,345,274.10/105,978.47
6. Step 6: Final answer
   x = 96,003.89