Finding the Fourth Proportional to 12,945.02, 19,420.86 and 5,921.67

Step by Step Solution

1. Step 1: Write the proportion equation
   12,945.02 : 19,420.86 = 5,921.67 : x
2. Step 2: Convert to fraction form
   12,945.02/19,420.86 = 5,921.67/x
3. Step 3: Cross multiply
   12,945.02x = 19,420.86 × 5,921.67
4. Step 4: Simplify right side
   12,945.02x = 115,004,019.07
5. Step 5: Solve for x
   x = 115,004,019.07/12,945.02
6. Step 6: Final answer
   x = 8,884.04