Finding the Fourth Proportional to 209,151.68, 288,582.72 and 118,499.72

Step by Step Solution

1. Step 1: Write the proportion equation
   209,151.68 : 288,582.72 = 118,499.72 : x
2. Step 2: Convert to fraction form
   209,151.68/288,582.72 = 118,499.72/x
3. Step 3: Cross multiply
   209,151.68x = 288,582.72 × 118,499.72
4. Step 4: Simplify right side
   209,151.68x = 34,196,971,516.84
5. Step 5: Solve for x
   x = 34,196,971,516.84/209,151.68
6. Step 6: Final answer
   x = 163,503.21