Finding the Fourth Proportional to 12,775.56, 19,164.30 and 3,415.37

Step by Step Solution

1. Step 1: Write the proportion equation
   12,775.56 : 19,164.30 = 3,415.37 : x
2. Step 2: Convert to fraction form
   12,775.56/19,164.30 = 3,415.37/x
3. Step 3: Cross multiply
   12,775.56x = 19,164.30 × 3,415.37
4. Step 4: Simplify right side
   12,775.56x = 65,453,062.39
5. Step 5: Solve for x
   x = 65,453,062.39/12,775.56
6. Step 6: Final answer
   x = 5,123.30