Finding the Fourth Proportional to 208,090.72, 287,168.88 and 117,464.80

Step by Step Solution

1. Step 1: Write the proportion equation
   208,090.72 : 287,168.88 = 117,464.80 : x
2. Step 2: Convert to fraction form
   208,090.72/287,168.88 = 117,464.80/x
3. Step 3: Cross multiply
   208,090.72x = 287,168.88 × 117,464.80
4. Step 4: Simplify right side
   208,090.72x = 33,732,235,055.42
5. Step 5: Solve for x
   x = 33,732,235,055.42/208,090.72
6. Step 6: Final answer
   x = 162,103.50