Finding the Fourth Proportional to 209,155.43, 288,598.85 and 118,492.67

Step by Step Solution

1. Step 1: Write the proportion equation
   209,155.43 : 288,598.85 = 118,492.67 : x
2. Step 2: Convert to fraction form
   209,155.43/288,598.85 = 118,492.67/x
3. Step 3: Cross multiply
   209,155.43x = 288,598.85 × 118,492.67
4. Step 4: Simplify right side
   209,155.43x = 34,196,848,868.81
5. Step 5: Solve for x
   x = 34,196,848,868.81/209,155.43
6. Step 6: Final answer
   x = 163,499.69