Finding the Fourth Proportional to 369,617.72, 510,069.98 and 208,474.10

Step by Step Solution

1. Step 1: Write the proportion equation
   369,617.72 : 510,069.98 = 208,474.10 : x
2. Step 2: Convert to fraction form
   369,617.72/510,069.98 = 208,474.10/x
3. Step 3: Cross multiply
   369,617.72x = 510,069.98 × 208,474.10
4. Step 4: Simplify right side
   369,617.72x = 106,336,380,017.52
5. Step 5: Solve for x
   x = 106,336,380,017.52/369,617.72
6. Step 6: Final answer
   x = 287,692.86