Finding the Fourth Proportional to 381,002.21, 525,788.98 and 208,935.89

Step by Step Solution

1. Step 1: Write the proportion equation
   381,002.21 : 525,788.98 = 208,935.89 : x
2. Step 2: Convert to fraction form
   381,002.21/525,788.98 = 208,935.89/x
3. Step 3: Cross multiply
   381,002.21x = 525,788.98 × 208,935.89
4. Step 4: Simplify right side
   381,002.21x = 109,856,185,859.55
5. Step 5: Solve for x
   x = 109,856,185,859.55/381,002.21
6. Step 6: Final answer
   x = 288,334.77