Finding the Fourth Proportional to 118,321.59, 163,290.42 and 64,611.60

Step by Step Solution

1. Step 1: Write the proportion equation
   118,321.59 : 163,290.42 = 64,611.60 : x
2. Step 2: Convert to fraction form
   118,321.59/163,290.42 = 64,611.60/x
3. Step 3: Cross multiply
   118,321.59x = 163,290.42 × 64,611.60
4. Step 4: Simplify right side
   118,321.59x = 10,550,455,300.87
5. Step 5: Solve for x
   x = 10,550,455,300.87/118,321.59
6. Step 6: Final answer
   x = 89,167.63