Finding the Fourth Proportional to 388,766.29, 536,677.59 and 274,138.33

Step by Step Solution

1. Step 1: Write the proportion equation
   388,766.29 : 536,677.59 = 274,138.33 : x
2. Step 2: Convert to fraction form
   388,766.29/536,677.59 = 274,138.33/x
3. Step 3: Cross multiply
   388,766.29x = 536,677.59 × 274,138.33
4. Step 4: Simplify right side
   388,766.29x = 147,123,898,271.03
5. Step 5: Solve for x
   x = 147,123,898,271.03/388,766.29
6. Step 6: Final answer
   x = 378,437.90