Finding the Fourth Proportional to 118,576.86, 163,632.57 and 64,860.72

Step by Step Solution

1. Step 1: Write the proportion equation
   118,576.86 : 163,632.57 = 64,860.72 : x
2. Step 2: Convert to fraction form
   118,576.86/163,632.57 = 64,860.72/x
3. Step 3: Cross multiply
   118,576.86x = 163,632.57 × 64,860.72
4. Step 4: Simplify right side
   118,576.86x = 10,613,326,305.65
5. Step 5: Solve for x
   x = 10,613,326,305.65/118,576.86
6. Step 6: Final answer
   x = 89,505.88