Finding the Fourth Proportional to 37,906.86, 52,311.76 and 20,911.70

Step by Step Solution

1. Step 1: Write the proportion equation
   37,906.86 : 52,311.76 = 20,911.70 : x
2. Step 2: Convert to fraction form
   37,906.86/52,311.76 = 20,911.70/x
3. Step 3: Cross multiply
   37,906.86x = 52,311.76 × 20,911.70
4. Step 4: Simplify right side
   37,906.86x = 1,093,927,831.59
5. Step 5: Solve for x
   x = 1,093,927,831.59/37,906.86
6. Step 6: Final answer
   x = 28,858.31