Finding the Fourth Proportional to 106,003.12, 146,293.28 and 72,086.84

Step by Step Solution

1. Step 1: Write the proportion equation
   106,003.12 : 146,293.28 = 72,086.84 : x
2. Step 2: Convert to fraction form
   106,003.12/146,293.28 = 72,086.84/x
3. Step 3: Cross multiply
   106,003.12x = 146,293.28 × 72,086.84
4. Step 4: Simplify right side
   106,003.12x = 10,545,820,268.44
5. Step 5: Solve for x
   x = 10,545,820,268.44/106,003.12
6. Step 6: Final answer
   x = 99,485.94