Finding the Fourth Proportional to 118,609.98, 163,685.86 and 64,895

Step by Step Solution

1. Step 1: Write the proportion equation
   118,609.98 : 163,685.86 = 64,895 : x
2. Step 2: Convert to fraction form
   118,609.98/163,685.86 = 64,895/x
3. Step 3: Cross multiply
   118,609.98x = 163,685.86 × 64,895
4. Step 4: Simplify right side
   118,609.98x = 10,622,393,884.70
5. Step 5: Solve for x
   x = 10,622,393,884.70/118,609.98
6. Step 6: Final answer
   x = 89,557.34