Finding the Fourth Proportional to 38,486, 57,738.72 and 10,784

Step by Step Solution

1. Step 1: Write the proportion equation
   38,486 : 57,738.72 = 10,784 : x
2. Step 2: Convert to fraction form
   38,486/57,738.72 = 10,784/x
3. Step 3: Cross multiply
   38,486x = 57,738.72 × 10,784
4. Step 4: Simplify right side
   38,486x = 622,654,356.48
5. Step 5: Solve for x
   x = 622,654,356.48/38,486
6. Step 6: Final answer
   x = 16,178.72