Finding the Fourth Proportional to 118,453.12, 163,465.59 and 64,738.78

Step by Step Solution

1. Step 1: Write the proportion equation
   118,453.12 : 163,465.59 = 64,738.78 : x
2. Step 2: Convert to fraction form
   118,453.12/163,465.59 = 64,738.78/x
3. Step 3: Cross multiply
   118,453.12x = 163,465.59 × 64,738.78
4. Step 4: Simplify right side
   118,453.12x = 10,582,562,702.69
5. Step 5: Solve for x
   x = 10,582,562,702.69/118,453.12
6. Step 6: Final answer
   x = 89,339.67