Finding the Fourth Proportional to 39,692.30, 54,776.00 and 21,788.94

Step by Step Solution

1. Step 1: Write the proportion equation
   39,692.30 : 54,776.00 = 21,788.94 : x
2. Step 2: Convert to fraction form
   39,692.30/54,776.00 = 21,788.94/x
3. Step 3: Cross multiply
   39,692.30x = 54,776.00 × 21,788.94
4. Step 4: Simplify right side
   39,692.30x = 1,193,510,868.50
5. Step 5: Solve for x
   x = 1,193,510,868.50/39,692.30
6. Step 6: Final answer
   x = 30,069.08