Finding the Fourth Proportional to 209,112.86, 288,565.00 and 113,619.33

Step by Step Solution

1. Step 1: Write the proportion equation
   209,112.86 : 288,565.00 = 113,619.33 : x
2. Step 2: Convert to fraction form
   209,112.86/288,565.00 = 113,619.33/x
3. Step 3: Cross multiply
   209,112.86x = 288,565.00 × 113,619.33
4. Step 4: Simplify right side
   209,112.86x = 32,786,561,677.40
5. Step 5: Solve for x
   x = 32,786,561,677.40/209,112.86
6. Step 6: Final answer
   x = 156,788.83