Finding the Fourth Proportional to 37,906.20, 52,309.91 and 20,912.07

Step by Step Solution

1. Step 1: Write the proportion equation
   37,906.20 : 52,309.91 = 20,912.07 : x
2. Step 2: Convert to fraction form
   37,906.20/52,309.91 = 20,912.07/x
3. Step 3: Cross multiply
   37,906.20x = 52,309.91 × 20,912.07
4. Step 4: Simplify right side
   37,906.20x = 1,093,908,499.61
5. Step 5: Solve for x
   x = 1,093,908,499.61/37,906.20
6. Step 6: Final answer
   x = 28,858.30