Finding the Fourth Proportional to 118,435.81, 163,443.55 and 64,723.09

Step by Step Solution

1. Step 1: Write the proportion equation
   118,435.81 : 163,443.55 = 64,723.09 : x
2. Step 2: Convert to fraction form
   118,435.81/163,443.55 = 64,723.09/x
3. Step 3: Cross multiply
   118,435.81x = 163,443.55 × 64,723.09
4. Step 4: Simplify right side
   118,435.81x = 10,578,571,596.57
5. Step 5: Solve for x
   x = 10,578,571,596.57/118,435.81
6. Step 6: Final answer
   x = 89,319.03