Finding the Fourth Proportional to 209,010.71, 288,441.59 and 118,364.72

Step by Step Solution

1. Step 1: Write the proportion equation
   209,010.71 : 288,441.59 = 118,364.72 : x
2. Step 2: Convert to fraction form
   209,010.71/288,441.59 = 118,364.72/x
3. Step 3: Cross multiply
   209,010.71x = 288,441.59 × 118,364.72
4. Step 4: Simplify right side
   209,010.71x = 34,141,308,036.70
5. Step 5: Solve for x
   x = 34,141,308,036.70/209,010.71
6. Step 6: Final answer
   x = 163,347.17