Finding the Fourth Proportional to 37,907.37, 52,312.77 and 20,911.31

Step by Step Solution

1. Step 1: Write the proportion equation
   37,907.37 : 52,312.77 = 20,911.31 : x
2. Step 2: Convert to fraction form
   37,907.37/52,312.77 = 20,911.31/x
3. Step 3: Cross multiply
   37,907.37x = 52,312.77 × 20,911.31
4. Step 4: Simplify right side
   37,907.37x = 1,093,928,288.86
5. Step 5: Solve for x
   x = 1,093,928,288.86/37,907.37
6. Step 6: Final answer
   x = 28,857.93