Finding the Fourth Proportional to 37,780.17, 52,138.38 and 21,861.54

Step by Step Solution

1. Step 1: Write the proportion equation
   37,780.17 : 52,138.38 = 21,861.54 : x
2. Step 2: Convert to fraction form
   37,780.17/52,138.38 = 21,861.54/x
3. Step 3: Cross multiply
   37,780.17x = 52,138.38 × 21,861.54
4. Step 4: Simplify right side
   37,780.17x = 1,139,825,279.91
5. Step 5: Solve for x
   x = 1,139,825,279.91/37,780.17
6. Step 6: Final answer
   x = 30,169.94