Finding the Fourth Proportional to 37,767.78, 52,126.06 and 21,861

Step by Step Solution

1. Step 1: Write the proportion equation
   37,767.78 : 52,126.06 = 21,861 : x
2. Step 2: Convert to fraction form
   37,767.78/52,126.06 = 21,861/x
3. Step 3: Cross multiply
   37,767.78x = 52,126.06 × 21,861
4. Step 4: Simplify right side
   37,767.78x = 1,139,527,797.66
5. Step 5: Solve for x
   x = 1,139,527,797.66/37,767.78
6. Step 6: Final answer
   x = 30,171.96