Finding the Fourth Proportional to 118,554.72, 163,665 and 91,636.44

Step by Step Solution

1. Step 1: Write the proportion equation
   118,554.72 : 163,665 = 91,636.44 : x
2. Step 2: Convert to fraction form
   118,554.72/163,665 = 91,636.44/x
3. Step 3: Cross multiply
   118,554.72x = 163,665 × 91,636.44
4. Step 4: Simplify right side
   118,554.72x = 14,997,677,952.60
5. Step 5: Solve for x
   x = 14,997,677,952.60/118,554.72
6. Step 6: Final answer
   x = 126,504.27