Finding the Fourth Proportional to 37,905.56, 52,309.56 and 21,138.56

Step by Step Solution

1. Step 1: Write the proportion equation
   37,905.56 : 52,309.56 = 21,138.56 : x
2. Step 2: Convert to fraction form
   37,905.56/52,309.56 = 21,138.56/x
3. Step 3: Cross multiply
   37,905.56x = 52,309.56 × 21,138.56
4. Step 4: Simplify right side
   37,905.56x = 1,105,748,772.63
5. Step 5: Solve for x
   x = 1,105,748,772.63/37,905.56
6. Step 6: Final answer
   x = 29,171.15