Finding the Fourth Proportional to 106,025.31, 146,300.76 and 65,724.37

Step by Step Solution

1. Step 1: Write the proportion equation
   106,025.31 : 146,300.76 = 65,724.37 : x
2. Step 2: Convert to fraction form
   106,025.31/146,300.76 = 65,724.37/x
3. Step 3: Cross multiply
   106,025.31x = 146,300.76 × 65,724.37
4. Step 4: Simplify right side
   106,025.31x = 9,615,525,281.52
5. Step 5: Solve for x
   x = 9,615,525,281.52/106,025.31
6. Step 6: Final answer
   x = 90,690.85