Finding the Fourth Proportional to 71,784.69, 107,692.42 and 21,868.81

Step by Step Solution

1. Step 1: Write the proportion equation
   71,784.69 : 107,692.42 = 21,868.81 : x
2. Step 2: Convert to fraction form
   71,784.69/107,692.42 = 21,868.81/x
3. Step 3: Cross multiply
   71,784.69x = 107,692.42 × 21,868.81
4. Step 4: Simplify right side
   71,784.69x = 2,355,105,183.67
5. Step 5: Solve for x
   x = 2,355,105,183.67/71,784.69
6. Step 6: Final answer
   x = 32,807.90