Finding the Fourth Proportional to 37,856.16, 52,240.80 and 20,861.98

Step by Step Solution

1. Step 1: Write the proportion equation
   37,856.16 : 52,240.80 = 20,861.98 : x
2. Step 2: Convert to fraction form
   37,856.16/52,240.80 = 20,861.98/x
3. Step 3: Cross multiply
   37,856.16x = 52,240.80 × 20,861.98
4. Step 4: Simplify right side
   37,856.16x = 1,089,846,524.78
5. Step 5: Solve for x
   x = 1,089,846,524.78/37,856.16
6. Step 6: Final answer
   x = 28,789.15