Finding the Fourth Proportional to 118,321.10, 163,289.73 and 64,611.10

Step by Step Solution

1. Step 1: Write the proportion equation
   118,321.10 : 163,289.73 = 64,611.10 : x
2. Step 2: Convert to fraction form
   118,321.10/163,289.73 = 64,611.10/x
3. Step 3: Cross multiply
   118,321.10x = 163,289.73 × 64,611.10
4. Step 4: Simplify right side
   118,321.10x = 10,550,329,074.00
5. Step 5: Solve for x
   x = 10,550,329,074.00/118,321.10
6. Step 6: Final answer
   x = 89,166.93