Finding the Fourth Proportional to 37,906.56, 52,313.28 and 21,985.20

Step by Step Solution

1. Step 1: Write the proportion equation
   37,906.56 : 52,313.28 = 21,985.20 : x
2. Step 2: Convert to fraction form
   37,906.56/52,313.28 = 21,985.20/x
3. Step 3: Cross multiply
   37,906.56x = 52,313.28 × 21,985.20
4. Step 4: Simplify right side
   37,906.56x = 1,150,117,923.46
5. Step 5: Solve for x
   x = 1,150,117,923.46/37,906.56
6. Step 6: Final answer
   x = 30,340.87