Finding the Fourth Proportional to 209,100.57, 288,549.38 and 118,454.69

Step by Step Solution

1. Step 1: Write the proportion equation
   209,100.57 : 288,549.38 = 118,454.69 : x
2. Step 2: Convert to fraction form
   209,100.57/288,549.38 = 118,454.69/x
3. Step 3: Cross multiply
   209,100.57x = 288,549.38 × 118,454.69
4. Step 4: Simplify right side
   209,100.57x = 34,180,027,357.59
5. Step 5: Solve for x
   x = 34,180,027,357.59/209,100.57
6. Step 6: Final answer
   x = 163,462.14