Finding the Fourth Proportional to 209,141.89, 288,592.38 and 118,478.44

Step by Step Solution

1. Step 1: Write the proportion equation
   209,141.89 : 288,592.38 = 118,478.44 : x
2. Step 2: Convert to fraction form
   209,141.89/288,592.38 = 118,478.44/x
3. Step 3: Cross multiply
   209,141.89x = 288,592.38 × 118,478.44
4. Step 4: Simplify right side
   209,141.89x = 34,191,974,978.29
5. Step 5: Solve for x
   x = 34,191,974,978.29/209,141.89
6. Step 6: Final answer
   x = 163,486.98