Finding the Fourth Proportional to 37,439.88, 51,665.22 and 21,520.68

Step by Step Solution

1. Step 1: Write the proportion equation
   37,439.88 : 51,665.22 = 21,520.68 : x
2. Step 2: Convert to fraction form
   37,439.88/51,665.22 = 21,520.68/x
3. Step 3: Cross multiply
   37,439.88x = 51,665.22 × 21,520.68
4. Step 4: Simplify right side
   37,439.88x = 1,111,870,666.75
5. Step 5: Solve for x
   x = 1,111,870,666.75/37,439.88
6. Step 6: Final answer
   x = 29,697.50