Finding the Fourth Proportional to 118,393.16, 163,379.88 and 64,678.41

Step by Step Solution

1. Step 1: Write the proportion equation
   118,393.16 : 163,379.88 = 64,678.41 : x
2. Step 2: Convert to fraction form
   118,393.16/163,379.88 = 64,678.41/x
3. Step 3: Cross multiply
   118,393.16x = 163,379.88 × 64,678.41
4. Step 4: Simplify right side
   118,393.16x = 10,567,150,864.39
5. Step 5: Solve for x
   x = 10,567,150,864.39/118,393.16
6. Step 6: Final answer
   x = 89,254.75