Finding the Fourth Proportional to 208,076.90, 287,147.12 and 117,436.69

Step by Step Solution

1. Step 1: Write the proportion equation
   208,076.90 : 287,147.12 = 117,436.69 : x
2. Step 2: Convert to fraction form
   208,076.90/287,147.12 = 117,436.69/x
3. Step 3: Cross multiply
   208,076.90x = 287,147.12 × 117,436.69
4. Step 4: Simplify right side
   208,076.90x = 33,721,607,315.83
5. Step 5: Solve for x
   x = 33,721,607,315.83/208,076.90
6. Step 6: Final answer
   x = 162,063.20