Finding the Fourth Proportional to 37,687, 52,008.06 and 20,921.56

Step by Step Solution

1. Step 1: Write the proportion equation
   37,687 : 52,008.06 = 20,921.56 : x
2. Step 2: Convert to fraction form
   37,687/52,008.06 = 20,921.56/x
3. Step 3: Cross multiply
   37,687x = 52,008.06 × 20,921.56
4. Step 4: Simplify right side
   37,687x = 1,088,089,747.77
5. Step 5: Solve for x
   x = 1,088,089,747.77/37,687
6. Step 6: Final answer
   x = 28,871.75