Finding the Fourth Proportional to 37,155.76, 51,274.94 and 21,240.55

Step by Step Solution

1. Step 1: Write the proportion equation
   37,155.76 : 51,274.94 = 21,240.55 : x
2. Step 2: Convert to fraction form
   37,155.76/51,274.94 = 21,240.55/x
3. Step 3: Cross multiply
   37,155.76x = 51,274.94 × 21,240.55
4. Step 4: Simplify right side
   37,155.76x = 1,089,108,058.79
5. Step 5: Solve for x
   x = 1,089,108,058.79/37,155.76
6. Step 6: Final answer
   x = 29,311.96