Finding the Fourth Proportional to 100,963.50, 139,300.63 and 65,173.87

Step by Step Solution

1. Step 1: Write the proportion equation
   100,963.50 : 139,300.63 = 65,173.87 : x
2. Step 2: Convert to fraction form
   100,963.50/139,300.63 = 65,173.87/x
3. Step 3: Cross multiply
   100,963.50x = 139,300.63 × 65,173.87
4. Step 4: Simplify right side
   100,963.50x = 9,078,761,150.54
5. Step 5: Solve for x
   x = 9,078,761,150.54/100,963.50
6. Step 6: Final answer
   x = 89,921.22