Finding the Fourth Proportional to 220,468.86, 303,796.71 and 208,559.34

Step by Step Solution

1. Step 1: Write the proportion equation
   220,468.86 : 303,796.71 = 208,559.34 : x
2. Step 2: Convert to fraction form
   220,468.86/303,796.71 = 208,559.34/x
3. Step 3: Cross multiply
   220,468.86x = 303,796.71 × 208,559.34
4. Step 4: Simplify right side
   220,468.86x = 63,359,641,331.77
5. Step 5: Solve for x
   x = 63,359,641,331.77/220,468.86
6. Step 6: Final answer
   x = 287,385.90