Finding the Fourth Proportional to 208,856.61, 288,222.42 and 113,363.33

Step by Step Solution

1. Step 1: Write the proportion equation
   208,856.61 : 288,222.42 = 113,363.33 : x
2. Step 2: Convert to fraction form
   208,856.61/288,222.42 = 113,363.33/x
3. Step 3: Cross multiply
   208,856.61x = 288,222.42 × 113,363.33
4. Step 4: Simplify right side
   208,856.61x = 32,673,851,870.75
5. Step 5: Solve for x
   x = 32,673,851,870.75/208,856.61
6. Step 6: Final answer
   x = 156,441.55