Finding the Fourth Proportional to 37,779, 52,137.09 and 21,868.57

Step by Step Solution

1. Step 1: Write the proportion equation
   37,779 : 52,137.09 = 21,868.57 : x
2. Step 2: Convert to fraction form
   37,779/52,137.09 = 21,868.57/x
3. Step 3: Cross multiply
   37,779x = 52,137.09 × 21,868.57
4. Step 4: Simplify right side
   37,779x = 1,140,163,602.26
5. Step 5: Solve for x
   x = 1,140,163,602.26/37,779
6. Step 6: Final answer
   x = 30,179.82