Finding the Fourth Proportional to 118,123.85, 163,007.36 and 64,409.91

Step by Step Solution

1. Step 1: Write the proportion equation
   118,123.85 : 163,007.36 = 64,409.91 : x
2. Step 2: Convert to fraction form
   118,123.85/163,007.36 = 64,409.91/x
3. Step 3: Cross multiply
   118,123.85x = 163,007.36 × 64,409.91
4. Step 4: Simplify right side
   118,123.85x = 10,499,289,064.89
5. Step 5: Solve for x
   x = 10,499,289,064.89/118,123.85
6. Step 6: Final answer
   x = 88,883.74