Finding the Fourth Proportional to 37,765.78, 52,123.30 and 21,859

Step by Step Solution

1. Step 1: Write the proportion equation
   37,765.78 : 52,123.30 = 21,859 : x
2. Step 2: Convert to fraction form
   37,765.78/52,123.30 = 21,859/x
3. Step 3: Cross multiply
   37,765.78x = 52,123.30 × 21,859
4. Step 4: Simplify right side
   37,765.78x = 1,139,363,214.70
5. Step 5: Solve for x
   x = 1,139,363,214.70/37,765.78
6. Step 6: Final answer
   x = 30,169.20