Finding the Fourth Proportional to 105,923.21, 158,884.56 and 66,507.98

Step by Step Solution

1. Step 1: Write the proportion equation
   105,923.21 : 158,884.56 = 66,507.98 : x
2. Step 2: Convert to fraction form
   105,923.21/158,884.56 = 66,507.98/x
3. Step 3: Cross multiply
   105,923.21x = 158,884.56 × 66,507.98
4. Step 4: Simplify right side
   105,923.21x = 10,567,090,344.37
5. Step 5: Solve for x
   x = 10,567,090,344.37/105,923.21
6. Step 6: Final answer
   x = 99,761.81