Finding the Fourth Proportional to 37,155.89, 51,278.73 and 21,237.31

Step by Step Solution

1. Step 1: Write the proportion equation
   37,155.89 : 51,278.73 = 21,237.31 : x
2. Step 2: Convert to fraction form
   37,155.89/51,278.73 = 21,237.31/x
3. Step 3: Cross multiply
   37,155.89x = 51,278.73 × 21,237.31
4. Step 4: Simplify right side
   37,155.89x = 1,089,022,285.42
5. Step 5: Solve for x
   x = 1,089,022,285.42/37,155.89
6. Step 6: Final answer
   x = 29,309.55